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3 Pin Crowtail Cable(5 PCS)
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Price: $2.65
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Elecrow Item #: EL-CPC03043C -

A 3 pin Crowtail cable for connecting the modules with main control board. Sell at a low price with good quality. If you want to choose 4 pin cable please click here 4 Pin Crowtail Cable Specification Length?20.5cm Package list 3 Pin Crowtail Cable x 5 Wiki & External links ...

4 Pin Crowtail Cable(5 PCS)
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Was: $2.98
Sale: $1.73
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Elecrow Item #: EL-CPC03044C -

A 4 pin Crowtail cable for connecting the modules with main control board. Sell at a low price with good quality. If you want to choose 3 pin cable please click here 3 Pin Crowtail Cable Specification Length?20.5cm Package list 4 Pin Crowtail Cable x 5 Wiki & External links ...

Crowtail - Base Board for Arduino Nano
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Price: $5.30
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Elecrow Item #: EL-CT0054NBB -

     The Crowtail- nano Base Shield plugs into nano Crowduino and is the foundation of the Crowtail system. ALL I/O ports of the Crowduino are exposed and adapted into Crowtail connectors which include digital I/O,analog I/O,and specialized ports(I2C?UART). Features Working voltage: 3.3~5 VDC RoHS Compatible Package list Crowtail- nano Base Shield x1 Wiki & External links Nano Base Shield Schematic Wiki link ...

Crowtail Connector(10 pcs)
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Price: $0.40
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Elecrow Item #: EL-CPC30403C -

Sometimes you want to make shields but you don't have this tiny widget- Connector, so we provide it now for bring convenience to you, which show in the pictures are called "Crowtail- connector", it's divides into two types, one of them is 3 pin connector and left one is 4 pin connector. Package list Crowtail Connector x 10 Wiki & External links Estimate Shipping Enter your destination to get a shipping estimate. *Country Afghanistan�land IslandsAlbaniaAlgeriaAmerican SamoaAndorraAngolaAngui...

Crowtail Starter Kit for Micro:bit
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Price: $129.11
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Elecrow Item #: EL-CRT45259M -

The BBC Micro:bit is a pocket-sized computer that can easily realize your creativity without much electrical and coding knowledge. There are numerous possibility of creation you can dig out by micro:bit, from robots to musical instruments. However if you want to create more things, just 1 micro:bit is barely not enough, That�s why we introduce the Crowtail Start Kit for micro:bit to you. The crowtail start kit for micro:bit can work with you for a lot of interesting things and brings endless...

Crowtail to Grove Convertor(5 pcs)
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Was: $3.31
Sale: $1.35
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Elecrow Item #: EL-CT0035324 -

This is a Compatible cable between the Crowtail system and Grove system. It can connect any crowtail module to Grove � base shied or to other compatible boards, also it can connect the Grove module to the Crowtail �Base Shield. For example, the Grove �Button can connect to the Crowtail �Base Shield, and the Crowtail � Button can connect to the Grove � Base Shield with this compatible cable.      Features Length:20cm 3Pin to 4Pin Part List 1 X Crowtail- 3 pin to 4 pin...

Crowtail- 1.3 Inch OLED
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Price: $28.14
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Elecrow Item #: EL-CRT01112O -

Crowtail- OLED is constructed from 128 x 64 dot matrix OLED module. The display offers high brightness, self-emission, high contrast ratio, slim/thin outline, wide viewing angle, wide temperature range and low power consumption. Specifications Connection Mode: I(IIC) Voltage: 5V Display Color: Blue/ Black Resolution: 128x64 Interface: I2C Wide range of operating temperature: -20�C~70�C Package list Crowtail-1.3 Inch OLED x 1 Wiki & External links User manual (wiki link) ...

Crowtail- 3-Axis Digital Accelerometer(?16g)
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Price: $11.92
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Elecrow Item #: EL-CT0056ADA -

NEW Crowtail- 3-Axis Digital Accelerometer(�16g) with specific Crowtail interface, It's base on an advanced 3-axis IC ADXL345, This is a high resolution digital accelerometer providing you at max 3.9mg/LSB resolution and large �16g measurement range . Have no worry to implement it into your free-fall detection project, cause it's robust enough to survive upto 10,000g shock. Meanwhile, it's agile enough to detect single and double taps.It's ideal for motion detection, Gesture detection as well...

Crowtail- 3-Axis Digital Compass
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Price: $12.58
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Elecrow Item #: EL-CT0059ADC -

Crowtail-3-Axis Compass module, a member of Crowtail family uses I�C based Honeywell HMC5883L digital compass. This ASIC is equipped with high resolution HMC118X magneto-resistive sensors and a 12-bit ADC. It provides compass heading accuracy up to 1� to 2�. Signal conditioning like amplification, automatic degaussing strap drivers and offset cancellation are inbuilt. This Crowtail module also includes a XC6206P332MR for power supply requirement. Hence user can connect any 3.3V to 6V DC power...

Crowtail- 3-Axis Digital Gyro
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Price: $13.24
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Elecrow Item #: EL-CT0058ADG -

Crowtail - 3-Axis Digital Gyro module based on ITG 3200. It is the world�s first single-chip, digital-output, 3-axis MEMS motion processing gyro optimised for gaming, 3D mice, and motion-based remote control applications for Internet connected Digital TVs and Set Top Boxes. The ITG-3200 features three 16-bit analog-to-digital converters (ADCs) for digitising the gyro outputs, a user-selectable internal low-pass filter bandwidth, and a Fast-Mode I2C (400kHz) interface. Features Supply Voltage:...

Crowtail- 315Mhz RF Receiver with Transmitter
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Price: $13.57
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Elecrow Item #: EL-CRT02059R -

Crowtail- 315Mhz RF Receiver with Transmitter consists of two parts,Transmitter and Receiver. It uses 315Mhz simplex wireless communication. This Crowtail is small, affordable and easy to carry, suitable for indoor and outdoor wireless communication systems, and anti-theft systems, household appliances and so on. Features Communication: AM Operating frequency: 315MHz Frequency stability: � 75KHZ Transmitting power: ? 500MW Quiescent current: ? 0.1UA Emission current: 3 ~ 50MA Operating...

Crowtail- 80cm Infrared Proximity Sensor
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Was: $21.09
Sale: $12.26
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Elecrow Item #: EL-CT0038IPS -

   A NEW Crowtail product! we add a crowtail port for pluging into crowtail base board. so it can simple use for our Crowduino. The Sharp distance sensors are a popular choice for many projects that require accurate distance measurements. This IR sensor is more economical than sonar rangefinders, yet it provides much better performance than other IR alternatives. Interfacing to most microcontrollers is straightforward: the single analog output can be connected to an...

Crowtail- A6 GPRS/GSM Module
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Was: $37.54
Sale: $20.90
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Elecrow Item #: EL-CT009818G -

How about �diy� a phone by using the Crowtail module? This is a new Crowtail- A6 GPRS/GSM Module, which is use the newest A6 gprs/gsm chip, A6 is a low-cost but efficient chip. With its ultra-small size, low power consumption and wide operating temperature range, A6 is an ideal solution for M2M applications, for automotive, industrial and PDA, personal tracking, power environmental monitoring, wireless POS, smart metering, and other M2M applications, to provide comprehensive GSM / GPRS text...

Crowtail- A6C GSM/GPRS Camera
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Price: $54.62
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Elecrow Item #: EL-CRT13123C -

This is a GPRS/GSM module with camera function and it has specific crowtail interface, which can be use with our crowduino/Arduino. It use the newest A6C module , A6C module is not only have GSM/GPRS function but also can take picture.It supports GSM/GPRS Quad-Band?850?9001800/1900? network. Also, it supports voice calls,SMS messages,GPRS data service and take picture by software .We can use it make a simple phone. The module is controlled by AT command via UART and supports 3.3V and 4.2V...

Crowtail- Adjustable Infrared Sensor 3-50cm
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Price: $16.22
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Elecrow Item #: EL-CT0036AIS -

A NEW product of Crowtail series ! This is an infrared distance switch. It has an adjustable detection ranging from 3cm to 50cm. It is small, easy to use/assemble, and inexpensive. Useful for robotics, interactive media, industrial assembly line, etc. we add a crowtail port for pluging into crowtail base board. Specification Power supply: 5V Current: 100mA Range: 3-50cm adjustable Wire length: 20cm compatiable with Crowtail port Wiki & External links Manual/Wiki ...

Crowtail- Air Quality Sensor
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Price: $17.68
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Elecrow Item #: EL-CT009989A -

This sensor is designed for comprehensive monitor over indoor air condition. It's responsive to a wide scope of harmful gases, as carbon monixide, alcohol, acetone, thinner, formaldehyde and so on. Due to the measuring mechanism, this sensor can not output specific data to describe target gases' concentrations quantitatively. But it's still competent enough to be used in applications that require only qualitative results, like auto refresher sprayers and auto air cycling systems. Features...

Crowtail- AM2302 Humidity&Temperature Sensor
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Price: $15.79
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Elecrow Item #: EL-CT009180A -

The module contains a AM2302(DHT22) temperature & humidity sensor that is a complex sensor with a calibrated digital signal out. It use digital module acquisition technology and the temperature&humidity sensor technology. Sensor consists of a resistance type moisture element and a NTC temperature measuring element. Because of single wire serial interface, it is easy to use the module. Features Crowtail interface High sensitivity Easy to use Specifications Package list Crowtail- AM2302...

Crowtail- Analog Grayscale Sensor
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Price: $3.58
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Elecrow Item #: EL-CT010448A -

Here comes Elecrow's new Analog Grayscale Sensor. New design and much more convenient to use.This module help you to detect the light density and reflect the analog voltage signal back to Arduino controller. You can set the threshold of voltage level to trigger motors, relays or other actuators. Features Supply Voltage: 3.3V to 5V Interface: Analog Size:20x20mm Package list Crowtail- Analog Grayscale Sensor x 1 Crowtail cable x 1 Wiki & External links Wiki link ...

Crowtail- Analog Gyro
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Price: $8.47
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Elecrow Item #: EL-CT0015AG -

     The Crowtail- Analog Gyro is based on an angular velocity sensor(Murata-ENC-03R) that uses the phenomenon of Coriolis force, which is generated when a rotational angular velocity is applied to.It provides 1-axis velocity with analog output. with precision and quick-response measurements, the modules suitable for applications with position& posture controlling. Features Connection Mode:A(Analog) Light Weigth Quick response Low driving voltage, low current...

Crowtail- Anemometer
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Price: $125.63
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Elecrow Item #: EL-CT010369A -

An anemometer is a device used for measuring wind speed, and is a common weather station instrument. This well made anemometer is designed to sit outside and measure wind speed with ease. Now we add a crowtail interface to it so that we can use it with our crowduino. The sensor is rugged, and easy to mount. The cable can easily disconnect with a few twists and has a weatherproof connector. W = 0; (f = 0) X = 0.1 + 0.0875 � f (f ? 0) (W: wind speed indication (m / s); f: the frequency of the...

Crowtail- Base Shield for Arduino
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Was: $19.80
Sale: $8.05
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Elecrow Item #: EL-CT0001BS -

     The Crowtail- Base Shield plugs into Arduino and is the foundation of the Crowtail system. ALL I/O ports of the Arduino are exposed and adapted into Crowtail connectors which include digital I/O,analog I/O,and specialized ports(I2C?UART). Features Working voltage: 3.3~5 VDC RoHS Compatible Package list Base Shield x1 Wiki & External links Base Shield Schematic Wiki link ...

Crowtail- Bluetooth Low Energy Module
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Was: $33.53
Sale: $19.50
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Elecrow Item #: EL-CT0018BLE -

    Crowtail- Bluetooth Low Energy Module HM-13 is an easy to use module compatible with the existing Crowtail Base Shield, and designed for transparent wireless serial connection setup. The serial port Bluetooth module is fully qualified BT Version V4.0 EDR + BLE dual mode with complete 2.4GHz radio transceiver and baseband. It has the smallest footprint of 13.8mm x 18mm. Hope it will simplify your overall design/development cycle. Features BT Version: Bluetooth Specification...

Crowtail- BME280 Atmospheric Sensor
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Price: $16.55
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Elecrow Item #: EL-CT010928S -

This Crowtail- BME280 Atmospheric Sensor is the easy way to measure barometric pressure, humidity, and temperature readings all without taking up too much space. Basically, you can find out anything you need to know about atmospheric conditions from this board. The Crowtaill- BME280 Atmospheric Sensor has been design to be used in indoor/outdoor navigation, weather forecasting, home automation, and even personal health and wellness monitoring. The Crowtail- BME280 Atmospheric Sensor measures...

Crowtail- BMP180 Barometer
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Price: $9.87
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Elecrow Item #: EL-CT0017BMP -

    The BMP180 offers a pressure measuring range of 300 to 1100 hPa with an accuracy down to 0.02 hPa in advanced resolution mode. It�s based on piezo-resistive technology for high accuracy, ruggedness and long term stability. These come factory-calibrated, with the calibration coefficients already stored in ROM. What makes this sensor great is that it is nearly identical to its former rev, the BMP085! Features Digital two wire (I�C, TWI, �Wire�) interface Wide barometric...

Crowtail- BMP280 Barometer Sensor
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Price: $21.52
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Elecrow Item #: EL-CRT00289B -

The Crowtail-BMP280 Barometer Sensor is a breakout board for Bosch BMP280 high-precision and low-power digital barometer. It can be used to measure temperature and atmospheric pressure accurately. It can be connected to a microcontroller with I2C. As the atmospheric pressure changes with altitude, it can also measure approximate altitude of a place. We have also provided highly abstracted library to make this product easier to use. Features Smaller footprint, lower power consumption, lower...

Crowtail- Bright LED
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Price: $7.95
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Elecrow Item #: EL-CRT00536L -

Crowtail bright LED is a bright LED light with high brightness and large angle. Then its� low termal resistance can be applied to indoor lighting, commercial lighting. It can provide a strong light source for your project, lighting, or so on. Features LED control mode is digital pin of Arduino. Can provide a strong light source for your project, lighting and etc. Specifications Operating voltage: 5 V Operating current: 20 mA (max) Supply mode: Crowtail interface LED control mode: digital pin...

Crowtail- Button
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Price: $4.90
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Elecrow Item #: EL-CT0002BT -

    This momentary button outputl logic HIHG when pressed and logic Low when released. The panel mount design makes it really suitable for installing on actuall projects.      There are five colors of the button including black,red,blue,green and yellow. If you have any demands on color, please leave a message when ordering, if not, we will sent you a random color. Features Connection Mode: D(Digital) Momentary Button Part List 1 X Crowtail-Butt...

Crowtail- Button Pack
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Price: $13.47
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Elecrow Item #: EL-CT0109KIT -

This is a Crowtail- button kit which has five kinds of color. It�s compatible with our Crowtail modules, also five Crowtail cables for use with others. This kind of momentary button output logic HIHG when pressed and logic Low when released. The panel mount design makes it really suitable for installing on actuall projects. Features Crowtail interface Connection Mode: D(Digital) Momentary Button Specifications Single size: 2(length)x 2(width)x 2.3(height) Total weight: 13.6g Package list...

Crowtail- Buzzer
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Price: $4.90
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Elecrow Item #: EL-CT0003BU -

    The buzzer module is for making sound in your project. It sounds when activated by a logic HIGH signal. Connect the buzzer to any of the D(digital) ports of Crowtail- Base Shiled, you can easily make it sounds with setting the related ports to logic HIHG.     The buzzer module can be also connected to an analog pluse-width modulation(PWM) output to generate various of tones. Features Connection Mode:D(digital); Panel Mount; Part List 1...

Crowtail- Collision Sensor
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Price: $4.63
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Elecrow Item #: EL-CT0061CCS -

This is a Robot model car crash or collision switch sensor module For Arduino, it normally outputs high voltage, but when the sensor is carsh something such as the wall, the on-board switch will be pressed, and the module outputs low. This module can be installed into any mobile platform to achieve collision detection function via 3P sensor cable and Arduino sensor expansion board connector. Its working voltage is 5v which make it compatible with standard Arduino/Crowduino 5V system. It has...

Crowtail- Current Power Sensor
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Price: $12.91
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Elecrow Item #: EL-CRT00455C -

The Crowtail- Current Power Sensor will solve all your power-monitoring problems. Instead of struggling with two multimeters, you can use this breakout to measure both the high side voltage and DC current draw over I2C with 1% precision. It is use the INA219B chip that much smarter - it can handle high side current measuring, up to +26VDC, even though it is powered with 3 or 5V. It will also report back that high side voltage, which is great for tracking battery life or solar panels. Features...

Crowtail- Current Sensor
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Price: $9.20
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Elecrow Item #: EL-CT0029CS -

This current sensor gives precise current measurement for both AC and DC signals. These are good sensors for metering and measuring overall power consumption of systems. The ACS712 current sensor measures up to 20A of DC or AC current. The ACS712 Low Current Sensor Breakout outputs an analog voltage that varies linearly with sensed current. To calibrate, first set the output offset to the desired level (with zero current on the sense lines, read output with a DVM). Then with a known current...

Crowtail- Current Sensor Kit
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Price: $21.12
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Elecrow Item #: EL-CT0065CSK -

A NEW member of our Crowtail, believe it can promote your work efficiency. The AC current sensor is based on Current transformers, it transforms the big AC current to little, and then convert to voltage with the build-in resistor so users can get the AC current value via measuring the output voltage with any microcontroller such as Arduino. The split core type makes this sensor suitable for DIY usage such as energy monitoring for house & building. Specification Crowtail compatible...

Crowtail- Digital Light Sensor
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Price: $18.21
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Elecrow Item #: EL-CT0040DLS -

This module is based on the I2C light-to-digital converter TSL2561 to transform light intensity to a digital signal. Different from traditional analog light sensor, as Crowtail - Light Sensor, this digital module features a selectable light spectrum range due to its dual light sensitive diodes: infrared and full spectrum. You can switch among three detection modes to take your readings. They are infrared mode, full spectrum and human visible mode. When running under the human visible mode,...

Crowtail- Digital Programmable Potentiometer
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Price: $9.60
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Elecrow Item #: EL-CRT02106P -

In a variety of bridge circuits, due to vibration, shock and temperature and humidity and other environmental factors, the potentiometer position and parameters will always change, so our common potentiometer always need to constantly adjust, these to use Brought a lot of inconvenient place. So we designed this product, a Crowtail- Digital Programmable Potentiometer, which not only eliminates the need for constant adjustment, but also improves the accuracy of the entire system, in addition to...

Crowtail- Digital Temperature Sensor
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Price: $9.60
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Elecrow Item #: EL-CRT00545T -

The module is a crowtail temperature sensor, its capable of reading temperature to a resolution is 0.0625 �C. The TMP102 is a two wire, serial output temperature sensor which available in a SOT563 package. It is compatible with SMBus and I2C interface, that can allow four device in one bus. At the same time, it is also a digital temperature sensor, which has higher stability than analog sensors and is more compatible with your design. The TM102 can be used on a variety extended temperature...

Crowtail- Dust Sensor - DSM501A
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Price: $23.17
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Elecrow Item #: EL-CT0039DSD -

    A NEW Crowtail product! we add a crowtail port for pluging into crowtail base board. so it can simple use for our Crowduino. The dust sensor module DSM501A is low cost, compact size for a particle density sensor.it is used to quantitative particle (> 1 micron) measurement with the principle of particle counter, can sense the tobacco smoke and pollen, house dust .     This sensor is consist of light emitting diode lamp, detector, signal...

Crowtail- Electricity Sensor
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Price: $7.08
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Elecrow Item #: EL-CT010593E -

The Electricity sensor module is a member of Crowtail. It is based on the TA12-200 current transformer which can transform the large AC into small amplitude. You can use it to test large alternating current up to 5A. Features Crowtail compatible interface Display Type: FSTN/Positive/Transflective/6:00 Visual Angle Maximum 5A input High accuracy Small size Specifications Ratio: 2000: 1 Input Current: 0-5A Output Current: 0-2.5mA Sampling resistor: 800? Sampling voltage: 2V Non-linearity:...

Crowtail- Electromagnet
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Price: $15.69
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Elecrow Item #: EL-CT008617E -

An electromagnet is a type of magnet in which the magnetic field is produced by electric current. An electric current flowing in a wire creates a magnetic field around the wire, due to Ampere's law(see drawing below). To concentrate the magnetic field, in an electromagnet the wire is wound into a coil with many turns of wire lying side by side. The magnetic field of all the turns of wire passes through the center of the coil, creating a strong magnetic field there. Crowtail - Electromagnet can...

Crowtail- Encoder
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Price: $12.18
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Elecrow Item #: EL-CT0004EN -

    This rotary encoder module encodes the rotation of the axis and outputs the signal by electronic pulse. There are two output pins of this module including signal A and signal B.Users can get the axis rotation angle and the direction, clockwise or counterclockwise, by sensing the output pins, with 20 pulses per circle.     As an incremental rotary encoder, unlike rotary potentiometer, this rotation counts are not limited, and the outputs are digital. Features...

Crowtail- Extend Board for Connection
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Price: $9.27
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Elecrow Item #: EL-CT0063EBC -

A Couple of extend board for further connection. Look at this Crowtail gadget, it will solve your big trouble when you want to set up a remote connection with Crowduino and Crowtail-modules. For using, you need to prepare a right length network cable, but you should notice that it can only compatible with the Straight-Through Wired Cables but not Crossover Wired Cables. It cheap and practical. Wish nice user experience. Features Size:20mm x 40mm Operate voltage: 3.3V/5V Compatible with...

Crowtail- Fingerprint Sensor
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Price: $123.81
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Elecrow Item #: EL-CT0047FPS -

A fingerprint sensor that use the crowtail interface in order to provide compatible with crowtail board. This all-in-one optical fingerprint sensor will make adding fingerprint detection and verification super simple. These modules are typically used in safes - there's a high powered DSP chip AS601 that does the image rendering, calculation, feature-finding and searching. Connect to any microcontroller or system with TTL serial, and send packets of data to take photos, detect prints, hash and...

Crowtail- G1" Water Flow Sensor
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Price: $19.47
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Elecrow Item #: EL-CT008211W -

You can use this water sensor with our crowtail mudules, because we reform the interface into crowtail compatiablely.Water flow sensor consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the...

Crowtail- G1/2" Water Flow Sensor
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Price: $8.94
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Elecrow Item #: EL-CT008012W -

Also a new member of crowtail family, it's a Crowtail- G1/2" Water Flow Sensor. Water flow sensor consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the pulse. It is suitable to detect flow in...

Crowtail- G1/4" Water Flow Sensor
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Price: $9.73
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Elecrow Item #: EL-CT007914W -

Our crowtail products need some water flow sensor, what we choose to join us crowtail is a G1/4" water flow sensor that consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the pulse. It is...

Crowtail- G3/4" Water Flow Sensor
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Price: $16.29
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Elecrow Item #: EL-CT008134W -

A Crowtail- G3/4" water flow sensor for providing more chooice of water flow sensors. Water flow sensor consists of magnetic core, rotating impeller, external casing and sensor and a hall-effect sensor. When water flows through the rotor, rotor rolls, it activates the magnetic core to trigger switch action speed changes with different rate of flow. The hall-effect sensor outputs the corresponding pulse signals, users can get the flow speed via detecting the pulse. It is suitable to detect flow...

Crowtail- Gas Sensor(MQ2)
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Price: $10.59
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Elecrow Item #: EL-CT0043GSS -

The crowtail - Gas Sensor(MQ2) module is useful for gas leakage detecting(in home and industry). It can detect LPG, i-butane, methane, alcohol, Hydrogen, smoke and so on. Based on its fast response time. measurements can be taken as soon as possible. Also the sensitivity can be adjusted by the potentiometer.There are different gas detectors for sale, like MQ3, MQ5 and MQ9. Below is a contrast table of them. Features Wide detecting scope Stable and long life Fast response and High sensitivity...

Crowtail- Gas Sensor(MQ3)
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Price: $11.92
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Elecrow Item #: EL-CT0041GST -

The module contains a MQ-3 Gas Sensor and ETA1036. High sensitivity to alcohol and small sensitivity to benzine with a stable and long worklife are most important reasons to choose the MQ-3. The ETA1036 is a high efficiency synchronous step-up converter that can provide up to 3W of power to a boosted output from a low voltage source. The start-up voltage requires only 0.85v and the efficiency up to 96%. The MQ-3 is useful for alcohol detecting. There are different gas detectors for sale, like...