Sensors & Transducers

Smoke Sensor Module, TTL Output

$46.33

SKU: ATO-GS-13

Smoke sensor module uses advanced chip thick film semiconductor gas sensors, which have extremely high sensitivity to smoke, propane, and other gases, TTL level output, self-diagnosis of faults, low power consumption, and long life. Cost-effective smoke sensor module is widely used in Household smoke alarms, industrial smoke alarms and portable smoke detection instruments.

True RMS Voltage Sensor, AC/DC 75mV-500V Input, DC 0-20mA Output

$168.96

SKU: ATO-VOS-TRMS20

The True RMS voltage sensor for sale, has AC/DC input voltages of 75mV, 30V, 50V, 100V, 250V, 300V, and 500V, output options include True RMS DC 4-20mA or 0-20mA. The voltage sensor requires DC +12V or +24V auxiliary power and has an accuracy class of 0.5. Ideal for use in applications such as Variable Frequency Drives (VFDs), motor control systems, power monitoring, and electrical equipment requiring accurate true RMS voltage measurement.

Waterproof Ultrasonic Water Level Sensor, IP67, 5m~30m

$232.35

SKU: ATO-LEVS-CS03

IP67 waterproof ultrasonic level sensor is designed for reliable and accurate liquid level measurement in various industrial and environmental applications. It features RS485 (Modbus RTU) communication and optional 4–20mA output, with measuring ranges available from 5m to 30m. It is ideal for monitoring water, sewage, slurry, and chemical levels in demanding outdoor or indoor conditions.

Alcohol Gas Sensor, 25ppm to 500ppm

$29.52

SKU: ATO-GS-3Q

This gas sensor has high sensitivity to alcohol gas and can resist interference from gasoline, smoke, and vapor. Quality semiconductor alcohol gas sensor has a detection range of 25ppm to 500ppm, widely used in household alcohol gas alarms, industrial alcohol gas alarms and portable alcohol detectors.

Digital Temperature and Humidity Sensor, RS485/4-20mA/0-5V/0-10V

$158.99

SKU: ATO-TAHS-9A

The digital temperature and humidity sensor is available now in hot sale with RS485 output and current and voltage output (4-20mA, 0-5V, 0-10V) for a wide range of monitoring and control needs. With a temperature range of -40°C to 80°C and a humidity measurement range of 0% to 100% RH, it is ideally suited for industrial and built environments.

Micro Ir Diffuse Photoelectric Switch, M3/M4/M5/M6/M8

$49.12

SKU: ATO-PHOS-M

Compact micro IR diffuse photoelectric switch with 10–30V wide voltage range and multi-protection design. Features imported optical module, a stainless steel shell, and 5ms fast response for stable, accurate detection. Ideal for automation and small equipment applications.

Micro Load Cell, Button type, 5kg/100kg/200kg/300kg/500kg/1000kg

$144.97

SKU: ATO-LC-BU04

Micro load cell has a capacity range from 5kg, 10kg, 20kg, 50kg, 100kg, 300kg to 1000kg. It has a button type structure, diameter 20mm and height 9mm, cable Φ3*2m. Button load cell can be used in laminator, riveter, force tester, any automation equipment needs force monitoring.

Mini Limit Switch, Adjustable Rod Lever/Roller Lever, 6A/250VAC

$61.23

SKU: ATO-LS-WL

Mini limit switches for sale online offer a choice between adjustable rod lever or roller lever options to suit specific application requirements. Compact limit switch features a rated current of 6A at 250VAC and are designed with an IP66 rating, ensuring protection against dust and water ingress. The electric limit switch includes normally open (NO) and normally closed (NC) contacts, providing flexibility for circuit design and application.

Non-invasive DC Current Sensor 400A/1000A/2000A/10000A to 20000A

$122.98

SKU: ATO-CUS-DC20000

Hall effect DC current sensor is non-invasive current sensors, with split-core structure, 1ms fast response time, 1.0%FS accuracy, 4-20mA output signal, 12V/24V power supply, strong anti-interference capacity. Open loop current sensors are widely used for DC current monitoring of battery/power inverter/UPS/solar power supply.

Potassium Sensor for Water Quality, 0.7~98,000 ppm

$589.63

SKU: ATO-WQS-IK

Good price potassium sensor with 0.7~98,000 ppm measurement range for water quality for sale. It has 0.01 ppm resolution, ±3% FS measurement accuracy. Digital potassium water quality sensor offers RS485 output signal. Application for drinking water, industrial circulation, wastewater, soil, seawater, and biological fluid testing.

PPM Oxygen Sensor, 10ppm/10000ppm

$239.41

SKU: ATO-GS-O2-10

Low price ppm oxygen sensor is for sale. O2 ppm sensor adopts voltage-divider electrochemical principle, which can accurately detect trace oxygen concentrations at the ppm level or even ppb level, and has core advantages such as low detection limit, fast response (<7s), and high stability. The detection range is from 0-10ppm to 0-10000ppm.

RTD Sensor with transmitter, Pt100, 2 Wire

$112.31

SKU: ATO-RTD-T2W

RTD sensor built-in small transmitter. It converts temperature to 4-20mA standard signal proportional to the electrical signals of thermistor, and outputs to display instrument or DCS system in control room. Transmitter adopts silicone rubber seal structure, good anti-interference ability, shock and humidity, apply to harsh environments. Measuring temperature range -200~+420 ℃.

Smart Wireless Ultrasonic Level Sensor, WiFi/Zigbee, 0-5m

$97.65

SKU: ATO-LEVS-LM01

Wireless ultrasonic level sensor is for sale at factory price. It supports 0-5m liquid level monitoring with an accuracy of ±0.02m, and is equipped with dual-connection functionality of 2.4G wireless WiFi and Zigbee. Smart WiFi level sensor also enables real-time viewing of liquid level data via APP and supports custom liquid level alarm settings, making it suitable for various scenarios.

Vortex Flow Sensor, 0.5-150 L/min, DN6/DN10/DN20/DN25

$91.61

SKU: ATO-FS-AFD2

Good vortex flow sensor for sale, available in pipe diameters of DN6, DN10, DN20, and DN25 as optional configurations, offers a versatile measurement range of 0.5~10 L/min, 1.8~32 L/min, 5~85 L/min, and 9~150 L/min. It can withstand a maximum pressure of 1 MPa, voltage range of 11.4~25.2V. Widely used in water heaters, HVAC flow detection, heat recovery systems, medical fluid flow detection systems.

Waterproof Draw-wire Displacement Sensor, 500-1000mm

$165.76

SKU: ATO-WDS-MPSXS

Waterproof draw-wire displacement sensor adopts a sturdy aluminum alloy housing and has waterproof function. The displacement range of the sensor can be selected from 500mm to 1000mm, the operating temperature range is -20℃ to 80℃, and it also supports multiple output types and can be integrated with a variety of control systems.

Digital Temperature Sensor with transmitter, Pt100, 2 Wire

$173.85

SKU: ATO-RTD-D2W

RTD sensor with digital meter can directly display high-precision real-time temperature. It converts temperature to 4-20mA standard signal proportional to the electrical signals of thermistor, and outputs to display instrument or DCS system in control room. Built-in small transmitter adopts silicone rubber seal structure, good anti-interference ability, shock and humidity, apply to harsh environments. Measuring temperature range -200~+420 ℃.

Gas Sensor, Methane(CH4)/ Hydrogen(H2)/ Carbon Monoxide(CO)/ TVOC

$54.12

SKU: ATO-GS-4GAS

The gas sensor is based on the MEMS principle and comes with low power consumption, high sensitivity and simple drive circuit. Factory price gas leak sensor is designed to measure Hydrogen H2 (30~3000ppm), Methane CH4 (1 %LEL~25%LEL ), Carbon Monoxide CO (50~1000ppm) and TVOC (50~5000ppm) concentration.

Gear Oil Flow Sensor, G1/4'', G1/2", G3/4"

$56.18

SKU: ATO-FS-OF07ZAT

High-performance gear oil flow sensor ensures fast response, ±1–3% accuracy, and wear resistance. Available in multiple connection sizes, including G1/4'' (2mm), G1/2'' (4mm), and G3/4'' (6mm) to accommodate various installation requirements. Features a PPS housing, ROHS certification, a wide voltage range, and stable operation for oil, chemical, and industrial applications.

Industrial Oxygen Sensor, Lead-free, 0-30%vol

$62.50

SKU: ATO-GS-O2-LFO2

Factory price industrial oxygen sensor adopts the electrochemical principle, with a detection range of 0-30% vol, 0-500ppm, a resolution of 0.1% vol, and a service life of up to 5 years. Industrial O2 sensor is suitable for various fields such as industrial production and environmental protection.

Infrared Human Sensor, Ceiling Mounted, RS485

$79.62

SKU: ATO-IHS-HWN01

Ceiling-mounted infrared human sensor adopts advanced PIR pyroelectric sensing technology, which can accurately detect human activities and trigger alarms. Through RS485 communication interface, it supports remote control and data transmission. Its power supply voltage range is 10-30VDC, and it is used in high security demand places such as computer rooms, data centers, warehouses, etc.