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10K NTC (Negative Temperature Coefficient) thermistor temperature sensor. Gold-plated 3mm diameter x 14.5mm long probe compresses, with spring-return, into a 4.2mm diameter x 9mm long collar. Thi... CAT# THM-43
$1.00 each
Quantity:  
10K Ohm NTC (Negative Temperature Coefficient) thermistor. 5mm epoxy coated disc. 500mW max power rating. -20 to 125C operating temperature. CAT# TNR-103
$0.65 each
10 to 99    $0.55 each
100 or more    $0.40 each
Quantity:  
 
Turn on low-voltage lights and other devices when it gets dark. Photocell controller closes circuit in dark environment, opens in light. Operates on 12-24 Vdc. Rated 8A. Easy-to-connect screw term... CAT# PSS-2
$24.85 each
Quantity:  
Metal-armored, encapsulated thermal sensor. Negative Temperature Coefficient (resistance drops as temperature increases) thermistor, approximately 50K Ohms @ room temperature. Metal probe is 23.5... CAT# THM-56
$1.50 each
Quantity:  
 
This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog r... CAT# SEN-3
$4.95 each
Quantity:  
This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. Detects CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivit... CAT# SEN-7
$7.25 each
10 to 99    $6.53 each
100 or more    $5.80 each
Quantity:  
 
Useful for gas leakage detection. High sensitivity to LPG, Propane and Hydrogen, also could be used to Methane and other combustible gasses. Uses the MQ135 gas sensor along with an LM393 dual diffe... CAT# MQ-135
$6.75 each
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Dallas DS18B20 temperature sensor chip mounted on a pc board with pins for plug-in use with Arduino and other platforms. Unique 1-Wire interface requires only one port pin for communication. Requ... CAT# TS-12
$5.75 each
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Veco #A396B 103S242. Two 500K thermistors molded into a plastic probe assembly, 0.30" diameter x 1" long. Four 9" leads, two for each thermistor. These assemblies are in good condition consider... CAT# THR-25
$0.65 each
Quantity:  
DIGMESA #FHKSC 974-9501-A180. Turbine Flow sensor for vending systems that use vibratory water pumps. NPN Normally Open transistor switch with internal 1.2K Pull-up. Output low upon detection. PBT... CAT# FSR-2
$3.95 each
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Analog gas sensor for Arduino and other development boards. Onboard MQ2 sensor is suitable for detecting LPG, i-butane, propane, methane , alcohol, Hydrogen, smoke. High sensitivity and fast respon... CAT# GS-29
$11.95 each
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Simple breakout board for the CAT#s SEN-3 and SEN-7 gas sensors. All you need is VCC at 5V, GND, and a resistor to an ADC, that is it. Note: This is the PCB only. 16.8mm diameter. CAT# SEN-BB
$0.95 each
Quantity:  
 
MICRONAS HAL115UA-C. Bi-polar Hall Effect Sensor. Detects the presence or the absence of a magnetic field. TO-92UA. Temp: 115C VDD = 4.5V to 24V Typical VDD = 12V. CAT# HES-1
$0.75 each
10 to 99    $0.65 each
100 or more    $0.55 each
Quantity:  
Allegro MicroSystems # UGN3503U. Ratio metric, linear hall-effect sensor in a miniature three-lead plastic SIP package. Hall-effect sensors accurately track extremely small changes in magnetic flu... CAT# HES-2
$1.75 each
10 or more    $1.35 each
Quantity:  
 
The RHT03 (also known by DHT-22) is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn't require extra components so you can get rig... CAT# SEN-16
$10.95 each
Quantity:  
Place the Swiss+Tech Motion Sensor Light, Tabletop style anywhere you need a little extra light. Turns on when it senses movement and turns off after 90 seconds. Sits on any flat surface and is gre... CAT# MSL-04
$5.95 each
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GY-30 digital light intensity detection module. BH1750FVI chip. Power supply: 3-5v. 16 bit AD converter. 33 x 16 x 3mm. Includes 5-pin header. CAT# LSR-30
$6.20 each
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National Semiconductor # LM34DZ. Precision integrated circuit temperature sensor whose voltage is linearly proportional to the Fahrenheit temperature. TO-92 package. Operates on 5 - 30 volts. Requ... CAT# LM34DZ
$3.30 each
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Winsen MQ131. Detects and measures Ozone (03) Concentration from 10ppb to 2ppm. Ideal for monitoring air quality or for use in environment and research experiments. Features · High Sensi... CAT# MQ-131
$17.95 each
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D203S dual-element infra-red motion sensor module. Used in security systems, light-switch controls, visitor acknowledgement devices, it senses changes in ir heat patterns. Dual elements provide acc... CAT# D203S
$3.50 each
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Photonic Detectors Inc # 1541-80A. Miniature photovoltaic cell in a 5mm diameter LED-type package. 0.53 Vdc. CAT# PD-8
2 for $1.00
100 or more    $0.40 each
Quantity:  
Minimum order of 2 pieces .
SEN-08630 RoHS Compliant. This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the alarm ... CAT# PIR-6
$9.95 each
10 or more    $8.96 each
Quantity:  
 
HC-SR501 Passive InfraRed (PIR) motion sensor can be used alone or with Arduino or other microcontroller. Adjustable sensitivity and timing. 33 x 24mm pc board. 25mm overall depth. CAT# PIR-7
$7.95 each
Quantity:  
Epcos B59901-D0080A040. PTC (Positive Temperature Coefficient) thermistor. 100 Ohm @ 25°C. Designed to be a 80°C limit temperature sensor. Epoxy resin coating with metal ring terminal for g... CAT# TNR-100
$1.50 each
Quantity:  
 
Optical heart rate sensor with amplification and noise cancellation circuitry making it fast and easy to get reliable pulse readings. In proximity to a pulse point on your body, it provides a digit... CAT# PSM-3
$14.00 each
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Clap or make a sound and this voice activated switch module will turn on a device. The controller starts a timer and the device will stay on for 1-60 seconds and then turn off. It will reset until... CAT# FA-408
$7.75 each
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Keyes "Funduino" Sound Sensor. Detects sounds using an LM386 audio amplifier and an electret microphone. Adjustable sensitivity with onboard pot. LED power indicator. Operates on 5 Vdc. CAT# SSM-1
$5.95 each
Quantity:  
Digital temperature and humidity sensor consists of a capacitive sense element and a precision wet NTC temperature measurement device with a high-performance 8-bit microcontroller connected. Standa... CAT# SEN-4
$3.95 each
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Thermoelectric temperature controller from Wavelength Electronics. Modified for a specific application. For information on the original design and the modifications - see spec sheet. 2.5" x 1.4"... CAT# TRC-1500
$3.00 each
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Approximate resistance at 70 degrees F = 37 ohms. 0.4" diameter. Positive temperature coefficient thermistor, resistance increases as temperature increases. CAT# THR-8
2 for $1.00
Quantity:  
Minimum order of 2 pieces .
 
Breakout board for the 3 axis ADXL335 from Analog Devices. The ADXL335 is a triple axis accelerometer with extremely low noise and power consumption - only 320uA! The sensor has a full sensing rang... CAT# ACL-69
$24.95 each
10 or more    $22.46 each
Quantity:  
The HC-SR04 Ultrasonic Sensor is an affordable proximity/distance sensor that can be used for object avoidance in various applications from robotics to car parking. The module has integral ultrason... CAT# UST-4
$4.50 each
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Matsushita #0D24K2. 0.95" diameter x 0.38" metal case. 0.65" long pc leads on 0.4" centers. CAT# XDR-24
$1.00 each
10 or more    $0.75 each
Quantity:  
 
 
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