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Selected Suppliers: Knowles Remove Adafruit Industries LLC Remove

Photo Cell (CdS Photoresistor)

Adafruit Industries LLC 161

Supplier: Adafruit Industries LLC

Subtitle: 161 - Photo Cell (CdS Photoresistor)
Description: CdS cells are little light sensors. If the face is exposed to more light, the resistance goes down. When its light, the resistance is about 5-10KΩ, when dark it goes up to 200KΩ. To use, connect one side of the photo cell (either one, its symmetric) to power (for example 5V) and the other side to...

Category: SensorsOpticalPhoto DetectorsCdS Photoconductive Cells (Ambient Light)

IR Break Beam Sensor - 5mm LEDs

Adafruit Industries LLC 2168

Supplier: Adafruit Industries LLC

Subtitle: 2168 - IR Break Beam Sensor - 5mm LEDs
Description: Infrared (IR) break-beam sensors are a simple way to detect motion. They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and it’s not transparent to IR, t...

Category: SensorsOpticalPhotoelectric, Industrial

10K Precision Epoxy Thermistor - 3950 NTC

Adafruit Industries LLC 372

Supplier: Adafruit Industries LLC

Subtitle: 372 - 10K Precision Epoxy Thermistor - 3950 NTC
Description: This epoxy-coated precision 1% 10K thermistor is an inexpensive way to measure temperature in weather or liquids. The resistance in 25°C is 10K (+- 1%). The resistance goes down as it gets warmer and goes up as it gets cooler. These are often used for air conditioners, water lines, and other plac...

Category: SensorsTemperatureThermistors NTC (Negative Temperature Coefficient)

High Temp Waterproof DS18B20 Digital Temperature Sensor

Adafruit Industries LLC 642

Supplier: Adafruit Industries LLC

Subtitle: 642 - High Temp Waterproof DS18B20 Digital Temperature Sensor
Description: This is a pre-wired and waterproofed version of the DS18B20 sensor made with a PTFE wire cable. Handy for when you need to measure something far away, or in wet conditions. Because the sensor signal is digital, you don't get any signal degradation even over long distances. These 1-wire digital te...

Category: SensorsTemperatureThermocouple, Temperature Probes

Waterproof DS18B20 Digital Temperature Sensor plus Extras

Adafruit Industries LLC 381

Supplier: Adafruit Industries LLC

Subtitle: Waterproof DS18B20 Digital Temperature Sensor plus Extras
Description: This is a pre-wired and waterproofed version of the DS18B20 sensor. For when you need to measure something far away, or in wet conditions. While the sensor is good up to 125°C, the cable is jacketed in PVC, keeping it under 100°C. Because they are digital, you do not get any signal degradation ev...

Category: SensorsTemperatureThermocouple, Temperature Probes

Platinum RTD Sensor PT100 - 3-Wire 1 Meter Long

Adafruit Industries LLC 3290

Supplier: Adafruit Industries LLC

Subtitle: 3290 - Platinum RTD Sensor PT100 - 3-Wire 1 Meter Long
Description: For precision temperature sensing, a Platinum RTD. Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor. In this sensor, the resistor is a small strip of Platinum with a res...

Category: SensorsTemperatureResistance Temperature Detectors (RTD)

BU Series

Knowles BU-23173-000

Supplier: Knowles

Subtitle: BU Series Accelerometers
Description: BU Series Accelerometers are frequently used as contact microphones for radio communications in high noise environments. The accelerometers reproduce voice signals from vibrations at the throat or from bony parts of the head, and are compatible with helmet or headset applications.

Category: SensorsInertiaAccelerometers

Vibration Sensor Switches

Adafruit Industries LLC 1766

Supplier: Adafruit Industries LLC

Subtitle: 1766, 1767 and 2384 - Vibration Sensor Switches
Description: These spring-vibration switches are sensitivity non-directional vibration induced trigger switches. Inside is a very soft spring coiled around a long metal pin. When the switch is moved, the spring touches the center pole to make contact. So, when there's motion, the two pins will act like a clos...

Category: SensorsInertiaVibration


Knowles BU-21771-000

Supplier: Knowles

Subtitle: Accelerometer
Description: Piezo-ceramic accelerometer

Category: SensorsInertiaVibration

Magnetic Contact Switch (Door Sensor)

Adafruit Industries LLC 375

Supplier: Adafruit Industries LLC

Subtitle: 375 - Magnetic Contact Switch (Door Sensor)
Description: This sensor is essentially a reed switch, encased in an ABS plastic shell. Normally the reed is 'open' (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5") away, the reed switch closes. They're often used to detect when a door or drawer is op...

Category: SensorsMagneticPosition, Proximity Speed Modules