Size: approx. 1.85 x 0.3cm/ 0.73" x 0.12" HALL EFFECT SENSOR 44E Hall Sensor Supply Voltage: 4.5-28V; Output Current: 25mA 3.5V to 24V DC operation voltage Low current consumption Temperature compensation Wide operating voltage range Open-Collector pre-driver 50mA maximum sinking output current

GY-61 ADXL335 3-Axis Analog Output Accelerometer Angular Transducer 3-5V Name: ADXL335module(triaxial accelerometeranalog output) Model: GY-61 Usingthechip: ADXL335 Supply Voltage: 3V ? 5V Full scale range: +/-3g Sensitivity: 300mV/g (Type) ADXL335 3-axis Accelerometer On-board 3.3V Voltage Regulator Analog voltage output centered at 1.65V Suitable for connection to 5V and 3.3V systems

KY-039 5V Finger Detection Heartbeat Sensor Module Detector For Arduino 1.This project uses bright infrared (IR) LED and a phototransistor to detect the pulse of the finger, a red LED flashes with each pulse .Pulse monitor works as follows: The LED is the light side of the finger, and phototransistor on the other side of the finger, phototransistor used to obtain the flux emitted, when the blood pressure pulse by the finger when the resistance of the phototransistor will be slight changed. 2.Chosing a very high resistance resistor R1, because most of the light through the finger is absorbed,it is desirable phototransistor sensitive enough. Resistance can be selected by experiment to get the best results.The most important is to keep the shield stray light into the phototransistor. For home lighting that is particularly important because the lights at home mostly based 50HZ or 60HZ fluctuate, so faint heartbeat will add considerable noise.

MQ-8 MQ8 Hydrogen Gas Sensor H2 Gas Detection Sensor Module Sensor for Arduino Main chip: LM393 gas sensor, MQ-8 Working voltage: DC5V 1. With signal output instructions. 2. Dual signal output (TTL level output and analog output) 3. TTL signal output valid for low level. (When the low output electric signal lights up in 4. Normal times, SCM can be directly picked up) 5. Analog 0 ~ 5v voltage, the higher the concentration, the higher the voltage. 6. High sensitivity to hydrogen 7. Can be resistant to ethanol vapor, LPG (petroleum), smoke interference 8. Has a long service life and reliable stability 9. Quick Response Recovery Features

Mq-6 Mq6 Liquefied Petroleum Gas Liquefied Isobutane Propane Gas Sensor Module High sensitivity to LPG, iso-butane, propane Small sensitivity to alcohol, smoke. Fast response Stable and long life Simple drive circuit Circuit voltage: 5V?0.1 Heating voltage: 5V?0.1 Load resistance: 20K? Heater resistance: 33??5% Heating consumption: less than 750mw Using Temperature: -10?C-50?C Storage Temperature: -20?C-70?C Related humidity: less than 95%Rh

MQ-3 Alcohol Ethanol Gas Sensor Module For Arduino Sensitive for alcohol, ethanol Power requirements: 5 VDC @ ~165 mA (heater on) / ~60 mA (heater off) Current Consumption: 150mA DO output: TTL digital 0 and 1 ( 0.1 and 5V) AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V Detecting Concentration: 0.05-10mg/L Alcohol Interface: 1 TTL compatible input (HSW), 1 TTL compatible output (ALR) Heater consumption: less than 750mW Operating temperature: 14 to 122 ?F (-10 to 50?C) Load resistance: 200k? Sensitivity S: Rs(in air)/Rs(0.4mg/L Alcohol)?5 Sensing Resistance Rs: 2K?-20K?(in 0.4mg/l alcohol) Dimensions: 32 x 22 x 16 mm

This is Hall Effect magnetic sensor module DC 5V for Arduino. Small size and high sensitivity. Fast response temperature and good performance. Precision and high reliability. 3144 Series Hall principle of Hall effect switch IC using technology to produce magnetic semiconductor integrated circuit which is determined by the voltage regulator Hall voltage generator differential amplifier Schmidt trigger temperature compensation circuit and the collector electrode open circuit output stage consisting of magnetic sensing circuit the input for the magnetic flux density the output is a digital voltage signal. This section circuit pipe legs with pure tin production the complete model is 3144EUA-S or 3144LUA-S. Item Size: 13x15MM Color: black Model: KY-003