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Ultrasonic
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Infra-red Phototransistor 940nm
$0.99  
28 pc(s)
This is a very simple, clear infrared phototransistor. These devices operate between 940-950nm and work well with our infrared LED . Phototransistors are similar to photoresistors (or LDR) but produce both current and voltage, while photoresistors only produce current....
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-26%
Thermistor 10K
$1.00 $1.35  
11 pc(s)
10K thermistor with a negative temperature coefficient. Good choice for temp-sensing aplications. Vishay part #: NTCLE100E3103JB0 Note: You get only one thermistor. Document: Datasheet
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Mini Photocell (LDR - Light Dependent Resistor)
$1.00  
68 pc(s)
This is a very small photocell. A photocell changes (also called a photodetector , CdS or photoconductive cell) resistance depending on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something)....
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Infra-red LED 950nm - 5mm (10 pcs)
$1.20  
89 pc(s)
This is a very simple, clear infrared LED. These devices operate between 940-950nm and work well for generic IR systems including remote control and touch-less object sensing. Pair them with any of our IR receivers (see Related Items below). 1.5VDC forward voltage and 50mA max forward...
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Photocell Light Sensor Module (Analog Output)
$1.20  
8 pc(s)
The LDR Sensor Module is used to detect the presence of light / measuring the intensity of light. The output of the module goes LOW in the presence of light and it becomes HIGH in the absence of light. Features: Voltage: 3.3V~5V Analog output Dimensions: 21 x...
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Infrared Remote Control (21 Buttons)
$1.50  
10 pc(s)
Have you ever needed a cheap way to activate something from across the room? Infrared remotes are still the cheapest way to wirelessly control a device. This 21 buttons remote controller works with TSOP38238 infrared receiver which have an operating voltage from 2.5V - 5.5V. Includes :...
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Screw Nut Set for HC-SR04 Ultrasonic Sensor
$1.65  
21 pc(s)
This screw / bolt set is specially sourced for HC-SR04 Ultrasonic sensor. Each set consists 4 pieces of screws, nuts and washer. Screw length: 10mm
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Infrared Remote Control Kit
$1.90  
6 pc(s)
Have you ever needed a cheap way to activate something from across the room? Infrared remotes are still the cheapest way to wirelessly control a device. The IR remote in this kit offers buttons for four directions, select and basic number keys. It is ideal for implementing an IR remote control...
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Flame Sensor Module
$1.90  
2 pc(s)
This Flame Sensor Module is sensitive to infra-red wavelength between 760 nm to 1100 nm that is emitted from fire flame. The module has 2 outputs: Analogue, which gives a real-time voltage output signal on thermal resistance, and Digital which allows temperature thresholds to be set via a...
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Infrared Obstacle Avoidance Sensor
$1.95  
10 pc(s)
The Infrared Obstacle Avoidance Sensor has a pair of infrared transmitting and receiving sensors. The infrared LED emits Infrared signals at certain frequency and when an obstacle appears on the line of infrared light, it is reflected back by the obstacle which is sensed by the receiver....
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HC-SR04 Ultrasonic Sensor Adaptor
$1.95  
23 pc(s)
This is a simple adaptor to provide an easy way to mount a HC-SR04 Ultrasonic Sensor to our 2WD Robot Chassis Kit . Fully assembled, no soldering is required. Notes: Copper standoff, nuts and screws are available separately.
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Line Follower Sensor
$1.99  
6 pc(s)
The Line Follower sensor gives your robot the ability to detect lines or nearby objects. The sensor works by detecting reflected light coming from its own infrared LED. It can detect transitions from light to dark (lines) or even objects directly in front of it. The sensor has an...
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Line Follower Sensor (Adjustable)
$1.99  
Out-of-stock
The Line Follower sensor gives your robot the ability to detect lines or nearby objects. The sensor works by detecting reflected light coming from its own infrared LED. It can detect transitions from light to dark (lines) or even objects directly in front of it. The sensor has an...
Out-of-stock
Water Sensor - Small
$2.10  
4 pc(s)
This Water Sensor is designed for water detection, which can be used in sensing the water level and leakage. This sensor works by having a series of exposed copper traces which will turn on the transistor when water droplets shot the copper traces. This sensor works with the digital I/O...
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-31%
Tilt Sensor
$2.20 $3.20  
12 pc(s)
This basic tilt switch can easily be used to detect orientation. Inside the can are a pair of balls that make contact with the pins when the case is upright. Tilt the case over and the balls don't touch, thus not making a connection. There are numerous uses for these basic sensors,...
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Photo Interrupter GP1A57HRJ00F Breakout Board
$2.35  
4 pc(s)
A simple breakout PCB for the GP1A57HR photo interrupter. This PCB has three connections for PWR, GND, and Signal. When the gate is clear, SIG will be high (>4.9V). When the gate is blocked by a finger, writing utensil, food pellet, or anything else - SIG will go low (<0.4V)....
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Photo Interrupter Module (T-Shape)
$2.50  
5 pc(s)
This Photo Interrupter Module is widely used in motor speed detection, pulse count, the position limit, etc. It will trigger a signal when light between the sensor's gap is blocked. It works with 3.3V to 5VDC, and gives a HIGH on DO pin when the beam is blocked, and a LOW output when...
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Water Sensor - Large
$2.50  
2 pc(s)
This water sensor is designed to detect water, which can be used to sense water level and leakage. It works by using exposed copper traces to detect the presence of water droplets. The sensor board has a sensing area of 47 x 36mm. The on-board potentiometer is used to set the threshold for...
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Photo Interrupter Module (Straight)
$2.50  
6 pc(s)
This Photo Interrupter Module is widely used in motor speed detection, pulse count, the position limit, etc. It will trigger a signal when light between the sensor's gap is blocked. It works with 3.3V to 5VDC, and gives a HIGH on DO pin when the beam is blocked, and a LOW output when...
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3-Pin Cable for Sharp Distance Sensors / SRF01 (w/Male Pin Header)
$2.90  
13 pc(s)
This 30cm cable has 26 AWG wires and a 3-pin female JST PH-style connector that works with Sharp Infra-red distance sensors: GP2Y0A02YK , GP2Y0A21YK and GP2Y0A41SK0F . The other ends of the wires are terminated with male pin header. The wire color scheme matches the Sharp distance sensor...
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Piezo Element
$2.90  
2 pc(s)
Piezo elements come in handy when you need to detect vibration or a knock. You can use these for tap or knock sensors pretty easily by reading the voltage on the output. They can also be used for a very small audio transducer such as a buzzer. Documents: Datasheet...
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Temperature Sensor - TMP36
$2.90  
375 pc(s)
The TMP36 are low voltage, precision centigrade temperature sensors. They provide a voltage output that is linearly proportional to the Celsius (centigrade) temperature. The TMP36 do not require any external calibration to provide typical accuracies of ±1°C at +25°C and ±2°C over the −40°C...
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Infrared Receiver Diode (TSOP38238)
$3.00  
33 pc(s)
Use this simple IR receiver for infrared remote control of your next project. With low power consumption and an easy to use package, it mates well with embedded electronics and can be used with common IR remotes. The TSOP38238 is a miniaturized receiver for infrared remote control...
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HC-SR04 Low Cost Ultrasonic Module (5V Supply)
$3.45  
15 pc(s)
HC-SR04 ultrasonic sensor provides a very low-cost and easy method of distance measurement. This sensor measures distance using sonar. An ultrasonic (well above human hearing) pulse is transmitted from the unit and distance-to-target is determined by measuring the time required for the...
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Soil Moisture Sensor
$3.50  
10 pc(s)
This soil moisture sensor can read the amount of moisture present in the soil surrounding it. It's a low tech sensor, but ideal for monitoring an urban garden, or your pet plant's water level. This is a must have tool for a connected garden! This sensor uses the two probes to pass...
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M5Stack Module - Light
$3.50  
9 pc(s)
M5Stack is a robust, Arduino compatible, open source development kit with stackable modules, enabling rapid and high-quality IoT prototyping. This M5Stack Light Module uses photo cell to measure light intensity. The resistance of the photo cell depending on the amount of light it is...
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HC-SR04 v2 - Low Cost Ultrasonic Sensor (3V to 5V Supply)
$3.95  
3 pc(s)
This product is the second generation of the popular HC-SR04 Low Cost Ultrasonic Sensor. Unlike the first generation HC-SR04 that can only operate between 4.8V to 5V DC, this new version has much wider input voltage range, allow it to work with controller operates on 3.3V. HC-SR04...
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-28%
Photo Interrupter GP1A57HRJ00F
$4.00 $5.55  
3 pc(s)
This sensor is composed of an infrared emitter on one upright and a shielded infrared detector on the other. By emitting a beam of infrared light from one upright to the other, the sensor can detect when an object passes between the uprights, breaking the beam. Used for many applications...
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MQ-5 Gas Sensor (LPG, Natural Gas)
$4.20  
3 pc(s)
This MQ5 Gas Sensor module is useful for gas leakage detection. It is suitable for detectingI Methane, Propane, Butane, and other combustible gas. The sensitivity of the sensor can be adjusted by potentiometer. Features High sensitivity to LPG, natural gas Low sensitivity...
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MQ-6 Gas Sensor (Propane, Butane and LPG)
$4.20  
3 pc(s)
This MQ6 Gas Sensor module is useful for gas leakage detection. It is suitable for detectingI Propane, Butane and LPG, and other combustible gas. The sensitivity of the sensor can be adjusted by potentiometer. Features Good sensitivity to wide range of combustible gas...
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MQ-2 Gas Sensor (LPG, Propane, Hydrogen, Methane)
$4.20  
2 pc(s)
This MQ2 Gas Sensor module is useful for gas leakage detection. It is suitable for detectingI LPG, Propane, Hydrogen, Methane and other combustible steam. The sensitivity of the sensor can be adjusted by potentiometer. Features Good sensitivity to wide range of combustible gas...
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PIR Motion Sensor (w/Adjustable delay and Sensitivity)
$4.20  
9 pc(s)
PIR sensors are used to detect motion from pets/humanoids from about 20 feet (~6 meters) away. This one has an adjustable delay before firing (approx 2-4 seconds) and adjustable sensitivity. You can easily reposition the sensor or mount it using the two holes on either side Runs on...
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MQ-4 Gas Sensor (Natural Gas)
$4.20  
5 pc(s)
This MQ4 Gas Sensor module is useful for gas leakage detection. It is suitable for detectingI Methane, Propane, Butane, and other combustible gas. The sensitivity of the sensor can be adjusted by potentiometer. Features Good sensitivity to wide range of combustible gas High...
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MQ-7 Gas Sensor (Carbon Monoxide)
$4.50  
2 pc(s)
This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. The sensitivity of the sensor can be adjusted by potentiometer. Features Good sensitivity to Carbon...
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MQ-8 Gas Sensor (Hydrogen)
$4.50  
2 pc(s)
This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time. The sensitivity of the sensor can be adjusted by...
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MQ-9 Gas Sensor (Carbon Monoxide / Combustible)
$4.50  
4 pc(s)
This is a simple-to-use Carbon Monoxide / Combustible gas sensor, suitable for sensing Carbon Monoxide / Combustible gas concentrations in the air. The MQ-9 can detect Carbon Monoxide / Combustible gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast...
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MQ-3 Gas Sensor (Alcohol)
$4.50  
3 pc(s)
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. The sensitivity of the sensor can be adjusted by potentiometer. Features Good sensitivity to alcohol gas...
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Miniature PIR Motion Sensor
$4.50  
6 pc(s)
This miniature PIR sensor is designed for motion detection. It uses pyroelectric sensor to detect motion by measuring changes in the infrared levels emitted by surrounding objects. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that...
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MQ-135 Gas Sensor For Indoor Air Quality Monitor
$4.50  
2 pc(s)
This is a simple-to-use gas sensor for indoor air quality monitor, suitable for sensing NH3, NOx, alcohol, Benzene, smoke and CO2 in the air. The MQ-135 can detect NH3 and Alcohol gas concentrations anywhere from 10-300ppm and Benzene from 10-1000ppm. This sensor has a high sensitivity and...
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Humidity and Temperature Sensor - DHT11
$4.95  
1 pc(s)
The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires...
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Basic Temperature-Humidity Sensor Breakout - DHT11
$5.50  
6 pc(s)
The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires...
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-21%
LPG Gas Sensor - MQ-6
$5.95 $7.50  
1 pc(s)
This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing  LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response...
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-20%
TEMT6000 Breakout Board
$6.00 $7.50  
3 pc(s)
Basic breakout board for the TEMT6000 Ambient Light Sensor. Only what you need, nothing you don't. Sensor acts like a transistor - the greater the incoming light, the higher the analog voltage on the signal pin. Documents: Datasheet Wiring Example...
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-30%
Force Sensitive Resistor - Small (FSR400) - Male Pin Header
$6.30 $9.00  
61 pc(s)
This is a small force sensitive resistor. It has a 0.16" (4 mm) diameter active sensing area. This FSR will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR,...
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-30%
Type-K Thermocouple probe - 150mm
$6.99 $10.00  
10 pc(s)
This is a stainless steel Type-K Thermocouple probe for measuring temperature from 0 to 400°C. The thermocouple junction of the probe is grounded, providing faster respond to temperature change. The probe itself is 150mm long, 5mm diameter and with M8 thread. Total length of the sensor,...
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Pulse Oximeter & Heart-Rate Sensor - MAX30102
$6.99  
4 pc(s)
MAX30102 Sensor is an integrated pulse oximetry and heart-rate monitor module. It is equipped with a red and IR LEDs as well as a very sensitive photon detector. The idea is to pulse the different LEDs, then detect what shines back. Based on the reflected signature it's possible to measure...
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-36%
Type-K Thermocouple probe - 200mm
$6.99 $11.00  
5 pc(s)
This is a stainless steel Type-K Thermocouple probe for measuring temperature from 0 to 400°C. The thermocouple junction of the probe is grounded, providing faster respond to temperature change. The probe itself is 200mm long, 5mm diameter and with M8 thread. Total length of the sensor,...
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-7%
Type-K Thermocouple probe - 50mm
$6.99 $7.50  
5 pc(s)
This is a stainless steel Type-K Thermocouple probe for measuring temperature from 0 to 400°C. The thermocouple junction of the probe is grounded, providing faster respond to temperature change. The probe itself is 50mm long, 5mm diameter and with M8 thread. Total length of the sensor,...
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-22%
Type-K Thermocouple probe - 100mm
$6.99 $9.00  
7 pc(s)
This is a stainless steel Type-K Thermocouple probe for measuring temperature from 0 to 400°C. The thermocouple junction of the probe is grounded, providing faster respond to temperature change. The probe itself is 100mm long, 5mm diameter and with M8 thread. Total length of the sensor,...
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-20%
Load Cell - 1kg, Straight Bar
$7.90 $9.90  
5 pc(s)
This straight bar load cell (sometimes called a strain gauge) can translate up to 1kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the...
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Through-Beam Infrared Sensor Kit - 30cm
$7.90  
8 pc(s)
This Through-Beam Infrared Sensor Kit consists of two separate components: an Infrared transmitter and detector. They work by having an transmitter side that sends out a beam of human-invisible infrared light, then a detector across the way which is sensitive to that same light. When an...
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-20%
Load Cell - 5kg, Straight Bar
$7.90 $9.90  
Out-of-stock
This straight bar load cell (sometimes called a strain gauge) can translate up to 5kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the...
Out-of-stock
-20%
Load Cell - 10kg, Straight Bar
$7.90 $9.90  
1 pc(s)
This straight bar load cell (sometimes called a strain gauge) can translate up to 10kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to...
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-20%
Load Cell - 20kg, Straight Bar
$7.90 $9.90  
4 pc(s)
This straight bar load cell (sometimes called a strain gauge) can translate up to 20kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to...
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-20%
Load Cell - 2kg, Straight Bar
$7.90 $9.90  
20 pc(s)
This straight bar load cell (sometimes called a strain gauge) can translate up to 2kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the...
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-20%
Load Sensor - 50kg
$7.90 $9.90  
12 pc(s)
This load cell / sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales. Each straight bar load cell is made from an aluminum-alloy and is capable of measure up to about 50kg. Documents : Specifications Load Sensor Tutorial (NerdKits)
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HC-SR04 Ultrasonic Sensor - I2C
$7.95  
15 pc(s)
This is the latest version of the popular HC-SR04 Low Cost Ultrasonic Sensor. Instead of the common GPIO interface, this version of HC-SR04 uses I2C to communicate with host controller. HC-SR04 ultrasonic sensor provides a very low-cost and easy method of distance measurement. It...
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Capacitive Touch Breakout - AT42QT1011
$9.50  
2 pc(s)
If you need to add user input without using a button, then a capacitive touch interface might be the answer. The AT42QT1011 SparkFun Capacitive Touch Breakout offers a single, momentary capacitive touch button with easy-to-use digital I/O pins. The AT42QT1011 is a dedicated,...
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Soil Moisture Sensor - Long Probe
$9.90  
Out-of-stock
This Soil Moisture Sensor is used to measure the moisture in soil and similar materials. The soil moisture sensor is pretty straight forward to use. The two long exposed metal rods function as probes for the sensor, together acting as a variable resistor. The more water that is in the soil...
Out-of-stock
Force Sensitive Resistor 0.5" (FSR402) - Male Pin Header
$9.90  
1 pc(s)
This is a force sensitive resistor with a round, 0.5" diameter, sensing area. This FSR will vary its resistance depending on how much pressure is being applied to the sensing area. The harder the force, the lower the resistance. When no pressure is being applied to the FSR its resistance will...
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Temperature Sensor - Waterproof (DS18B20) w/Male Pin Header
$9.90  
5 pc(s)
This sealed digital temperature probe lets you precisely measure temperatures in wet environments with a simple 1-Wire interface. The DS18B20 provides 9 to 12-bit (configurable) temperature readings over a 1-Wire interface, so that only one wire (and ground) needs to be connected from a...
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VL53L0X Time of Flight Distance Sensor - ~30 to 1000mm
$9.90  
5 pc(s)
The VL53L0X from ST Microelectronics is a time-of-flight ranging system integrated into a compact module. The sensor contains a very tiny invisible IR source, and a matching detector. It measures how long it takes for emitted pulses of infrared laser light to reach the nearest object and be...
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VL6180X Time of Flight Distance Sensor - 60cm Max
$9.90  
2 pc(s)
This sensor is a breakout board for ST's VL6180X proximity and ambient light sensor, which measures the range to a target object up to 20 cm away (or 60 cm with reduced resolution). The VL6180X uses time-of-flight measurements of infrared pulses for ranging, allowing it to give accurate results...
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