Test & Measurement Instruments

Rotating Digital Vane Anemometer, 0~45 m/s

$219.54

SKU: ATO-DVAM-045

Good price digital rotating vane anemometer for sale. Wind speed measurement range 0~45 m/s, air volume 0~9999 CFM/CMM, air temperature range 0~45 ℃, power supply 4*1.5V AAA batteries. Portable wind speed sensor for wind velocity, temperature and flow testing, mini size, handheld use.

Round Electric Hour Meter, Wide Voltage, Waterproof

$59.41

SKU: ATO-EHM-WV

Accurately records equipment operating hours with a cumulative range spanning 0–99,999.9 hours. Featuring a mechanical core design, this electric hour meter supports wide voltage input and boasts IP67-rated waterproof and dustproof protection, delivering stable and reliable performance.

Round Head Stainless Steel Angle Protractor, 90x200mm

$11.86

SKU: ATO-AP-200

The semi-circular stainless steel angle protractor is available in a measuring range of 0 to 180 degrees and comes in a size of 90x200mm. The round head angle protractor has a compact size and lightweight construction and is commonly used in construction, engineering, and carpentry.

Round RPM Hour Meter, LCD Backlight

$74.12

SKU: ATO-RHM-LCD

High-precision hour meter for engines, providing accurate and reliable timekeeping. Total timing range up to 99,999 hours, supporting 0–20,000 RPM with 10 RPM accuracy, displaying real-time speed and cumulative hours. CMOS EEPROM memory protects data from power loss or corruption. Low-power design and external power compatibility ensure long-term stable operation, offering a reliable data foundation for engine maintenance and lifespan management.

Salinometer/TDS Meter, 0~10000PPM, Salinity 0.01%~25%

$167.59

SKU: ATO-WQT-1116

Salinometer/TDS meter for sale, suitable for water quality, salinity, TDS (PPM), and temperature measurement. Salinity measurement range can select 0.01% ~5%, 0.01% ~10, 0.01% ~15% or 0.01% ~25%. TDS measurement range can reach 0~10000PPM.

Single Mode Mini OTDR Tester

$897.86

SKU: ATO-OTDR-4000D

Mini single mode OTDR fiber tester wavelength 1550nm, dynamic range 24dB, support fully automatic OTDR, expert OTDR, event map, OPM, VFL, power-adjustable and stable OLS, optical loss test, RJ45 cable length/sequence/tracking and other functions. Mini OTDR fiber tester with high-capacity lithium battery, up to 12 hours of use, ideal for long outdoor work.

Single Phase AC Modular Voltmeter, Din Rail Mount

$49.29

SKU: ATO-BV-1R

Purchase economical price single phase AC modular voltmeter online, voltage display range from 80VAC to 500VAC, 35mm DIN rail mount. This digital panel voltage meter is a versatile electrical measurement device designed for accurately measuring voltage in 1 phase alternating current (AC) systems.

Single Phase DIN Rail Mounted Digital Energy Meter

$183.07

SKU: ATO-DEM-1P

DIN-rail mounted digital energy meter is single phase 230V AC output voltage, direct connection up to 40A, with class 1 accuracy in active energy, 1 loop active pulse output, compact design, is suitable in applications where there is a need for reliable energy measurements and where space is limited.

Single Phase LCD Display Digital Electric Energy Meter

$225.69

SKU: ATO-DEM-2P

Single phase digital electric energy meter with class 1 accuracy for active energy, DIN-rail mounted, direct connection up to 100A, LCD display with 4 digits, can be equiped with built-in serial communication interfaces for Modbus-RTU (RS-485) protocol.

Single Phase Relay Test Equipment

$3,461.54

SKU: ATO-RT701

Multi-function single phase relay test equipment, overload protection and signal form a powerful display unit, single phase relay test kit is compact, small and easy to carry, manufacturer direct sales.

Single Use Temperature Data Logger, USB, Disposable

$24.43

SKU: ATO-TDL-U02

Single use temperature data logger at low price, temperature recording range -30℃ ~ +60℃ (22℉ or 140℉), used for shipping, vaccine storage and cold chain. 30/60/90 days recording duration could be selected. Disposable temp data logger can be inserted to computer’s USB port and get PDF report directly.

Small Ergonomic Digital Force Gauge, 10N-500N

$90.88

SKU: ATO-FG-ZMF

The small ergonomic digital force gauge features three measurement modes and four measurement units, being lightweight and portable with multiple probe options. The LCD screen provides clear and instant readings. The push-pull force gauge's high-precision design ensures accurate measurements, while allowing users to set upper/lower limits with audible alarm for out-of-range values.

Small Gas Mass Flow Meter, Air/O2/N2, 0-2/5/50L/min

$445.58

SKU: ATO-FLOW-MF4000

Small gas mass flow meter is characterized with compact size, high accuracy and good repeatability, designed for low gas flow rate (0-2/ 5/ 50L/min) in the gas lines of 3mm and 8mm in diameter, easy for installation with BST1/4 (R1/4) connection, LED display instantaneous flow rate and flow accumulation, suitable for wide applications involving compressor air, O2, N2, etc.

Smart Air Quality Tester, CO2/ PM2.5/ TVOC/ PM1.0/TEMP/ HUM

$217.92

SKU: ATO-AIR-PT02

Smart Air Quality Tester detects CO2, PM2.5, TVOC, PM1.0, temperature and humidity, supporting RS485 data output and historical data record query. Smart air quality monitor with remote Wi-Fi connection, and customers specify APP to query data, support for custom sensors and function.

Smart Multimeter for Volt/Ohm/Amp

$106.15

SKU: ATO-MLT-78

1000V 20A smart multimeter can be used for measuring voltage/current/resistance/capacitance/resistance/temperature. It is a digital true RMS multimeter with a 5999 max display, manual range, diode testing, triode testing, NCV test, and multi-functions, widely used in electronics, electrical engineering, electrical repair, etc.

Smart Photo Tachometer, MCU Chip

$56.66

SKU: ATO-TM-SP

Smart photo tachometer with a 2.5-99999 rpm measuring range, non-contact measurement, and automatic ranging. Data storage, anti-interference capability, and a large LCD display with clear, parallax-free readings and low-battery indication. Micro MCU chip and photodiode for accurate speed measurement.

Smart Water Leakage Detector

$54.44

SKU: ATO-WLD-9

Cheap price smart water leak detector with wireless range 45m, current 5 uA, 2.4 GHz WiFi technology supports. The water leakage detector connects the gateway to WiFi and instantly receives app notifications and alerts to your phone, plus emails to your inbox when water leakage is detected.

Smart Water Quality Tester, Bluetooth-enabled

$75.59

SKU: ATO-WQT-BE

Smart water quality tester bluetooth model offers fast, accurate testing for pH, TDS, EC, salinity, and temperature. Bluetooth syncs data in real time with a mobile app, displaying multiple readings at once. Test records are saved automatically for trend tracking. The backlight ensures clear visibility in low light.

Smoke & Carbon Dioxide (CO2) Detector, Wifi/ Smoke Alarm

$120.23

SKU: ATO-SMOKE-PT01

Smoke carbon dioxide (CO2) detector detects carbon dioxide with NDIR CO2 sensor, battery capacity 1400mAh. Carbon Dioxide smoke alarm detector with resolution 1 ppm and Wi-Fi tuya remote control. Detection range contains CO2, humidity, temperature. Smart smoke carbon dioxide monitor relatively small, used in bedroom living room, dining room, office, gym, park.

Smoke & Carbon Monoxide (CO) Detector, Wifi/ Smoke Alarm

$111.62

SKU: ATO-SMOKE-PT03C

Smoke and carbon monoxide detector for sale, with smoke alarm, LCD display. Smoke and carbon monoxide monitor with alarm function as well as remote controlled by Wifi. This real time monitor can measure CO range of 0-1000 ppm, temperature range of -20°-60°C (±2%) and humidity measurement of 5%-95% (±5%). Built-in battery for 6-8 hours working without power, fire-proof ABS material.