Overview

Environmental test instruments are designed to monitor, measure, and analyze environmental parameters that affect human health, industrial processes, and ecosystem balance. These tools help researchers, engineers, and regulators ensure compliance with safety standards, maintain process quality, and detect potential hazards in diverse environments. With advanced sensing and data logging capabilities, they provide accurate and reliable information for decision-making in critical applications. Headquartered in New York City and Toronto, Canada, GAO Tek Inc. is ranked among the world’s top 10 suppliers of advanced B2B technologies. Alongside our sister companies GAO Research Inc. and GAO RFID Inc., we form GAO Group, serving leading universities, Fortune 500 companies, government agencies, and R&D organizations across North America for over four decades. GAO Tek’s environmental test instruments are backed by rigorous R&D investment, stringent quality controls, and expert support both remotely and onsite, ensuring high-performance solutions for professionals worldwide.

Below is a list of all GAO Tek’s Environmental Testing and Measurement products:

Hydrogen Gas Leakage Detector – GAOTek

SKU: GAOTek-HGD-117
Hydrogen Gas Leakage Detector detect H2 gas concentration in the air by pump suction. 

Handheld Fruit Powders Colorimeter – GAOTek

SKU: GAOTek-HCC-243
Overview A powerful handheld fruit powder colorimeter with excellent accuracy, fast measurement, and seamless PC & Bluetooth connectivity.    Technical

GAOTek Fruit And Veg Colorimeter

SKU: GAOTek-CFB-209
It uses a built-in silicon photodiode array (dual-row 24 groups) sensor, an imported white board, and the repeatability ΔE x ab can be easily controlled within 0.04.

 Electronic Stainless Steel High Pressure Anemometer – GAOTek

SKU: GAOTek-PAM-329
This Electronic Stainless Steel High Pressure Anemometer has accuracy of ±0.1% FS, an IP 65 protection, and pressure range of -14.5 psi to 8703 psi.

 GAOTek Portable 6 in 1 gas detector with pump – 6 Level Adjusted Pump

SKU: GAOTek-OOGD-123
Versatile 6-in-1 gas detector with pump. Waterproof, explosion-proof, and drop-proof. Large color screen, adjustable pump levels.

 GAOTek Thermometer Gun Laser

SKU: GAOTek-HITC-201
This Thermometer Gun Laser has a resolution of 0.1 ℉, 0.5 s measuring time, and a response time of 8 um to 14 um.

10Hz High Sensitivity Hydrophone with KCK Connector for Marine – GAOTek

SKU: GAOTek-SHT-234
High-sensitivity 10Hz hydrophone with KCK connector for accurate underwater acoustic monitoring up to 100m depth in marine research and testing.

16-Channel Digital Gas Alarm Controller – GAOTek

SKU: GAOTek-CGD-806
Digital 16-channel gas alarm controller with color touch display, 4–20 mA and RS-485 communication, analog input support, and robust power backup. Designed for centralized monitoring across industrial gas safety systems.

16-Channel Digital Oven Thermometer Temperature Data Logger – GAOTek

SKU: GAOTek-TTDL-500
Multi-channel digital oven thermometer and temperature data logger for accurate heat monitoring in industrial and laboratory applications.

2-in-1 HCHO & TVOC Air Pollution Detector with LCD & API Monitoring – GAOTek

SKU: GAOTek-FGD-121
Portable 2-in-1 meter for real-time monitoring of formaldehyde and TVOC with LCD display, API calculation, and alarm functions.

3 in 1 Gas Detector for Formaldehyde Ozone Fluorine Detection Alarm – GAO Tek

SKU: GAOTek-GD-001
GAO Tek 3-in-1 gas detector for fixed monitoring of formaldehyde, ozone, and fluorine with sound-light alarm and integration options.

3 in 1 Indoor Air Quality Monitor with CO2, Temperature Humidity – GAOTek

SKU: GAOTek-OCGD-172
3-in-1 indoor air quality monitor with CO2, temperature, and humidity, featuring LCD display and compact design for home, office, and lab monitoring.

3 in1 Hydrogen H2 Gas Dew Point Detector with 0-100% Range – GAOTek

SKU: GAOTek-HGD-191
3-in-1 hydrogen H2 gas and dew point detector. 0-100% H2 range, -60°C to 20°C dew point. For industrial safety and environmental monitoring.

3-Cup Industrial-Grade Waterproof Anemometer – GAOTek

SKU: GAOTek-CA-298
This 3-Cup anemometer has IP67 waterproof protection, a rated frequency of 50 Hz to 60 HZ, Voltage of 230 V, Ie 3 efficiency, and IP67 protection.  

3-Cup Wind Anemometer – GAOTek

SKU: GAOTek-CA-249
3-Cup Wind Anemometer has a mechanical rotate sensor, cup turns round once blown. 

3-In-1 Air Quality Detector–TVOC, HCHO COâ‚‚ Monitoring Device – GAOTek

SKU: GAOTek-NGD-170
Compact 3-in-1 air quality detector for TVOC, HCHO & COâ‚‚ with real-time monitoring, high sensitivity sensors, and lightweight portable design.

3-in-1 Environmental Temperature, Humidity Vibration Tester – GAOTek

SKU: GAOTek-OET-294
3-in-1 tester measuring temperature, humidity, and vibration for precise environmental monitoring in labs, industry, and R&D.

3-in-1 Multifunction Weather Station Barometer Hygrometer – GAOTek

SKU: GAOTek-MFH-413
This portable 3-in-1 weather station accurately measures temperature, humidity, and atmospheric pressure to predict future weather changes.

4 – in – 1 Portable Multi – Gas Detector with LCD and Rechargeable Battery – GAOTek

SKU: GAOTek-OGD-268
Reliable 4-in-1 gas detector for Oâ‚‚, CO, Hâ‚‚S & LEL. Compact, rechargeable, with LCD & alarms for industrial and confined space safety.

4 In 1 Gas Detector Analyzer with Specifically Methane-GAOTek

SKU: GAOTek-IMGD-277
The GAOTek 4 In 1 Gas Detector 4 Unity Gas Analyzer detects CO, H2S, O2, CH4, with a large LCD, IP65 protection, low battery reminder, and multiple alarms. 1-year warranty.

4 in 1 Portable Gas Detector – Flammable Gas Safety Device

SKU: GAOTek-OGD-267
Lightweight 4 in 1 gas detector with 3.7V lithium battery, ABS body, and real-time monitoring. Perfect for industrial, commercial & home safety.

4-Channel Digital Thermocouple Thermometer Data Logger with Multi-Type Inputs – GAOTek

SKU: GAOTek-TTDL-269
Digital thermocouple thermometer data logger with 4 channels supports multiple types for accurate temperature monitoring and large data storage capacity.

4-in-1 Gas Detector w/ Vibration, Light Alarms, Pump – GAOTek

SKU: GAOTek-MGD-499
Portable 4-in-1 gas detector with pump, vibration & light alarms, rechargeable battery, data logging, IP66 rating for reliable and safe monitoring. 

4G Digital Universal Multimeter Data Logger for Temperature – GAOTek

SKU: GAOTek-TDL-508
Versatile 4G digital universal multimeter data logger for monitoring temperature, pressure, and AC/DC voltage with Modbus support in water and power systems.

GAO Tek’s products of Environmental Testing and Measurement are organized as follows:

Anemometers

Anemometers are instruments used to measure wind speed and airflow. GAO Tek’s anemometers are engineered with digital sensors and portable designs, providing fast and precise readings for indoor and outdoor applications.

They are applied in HVAC system monitoring, meteorology, wind energy assessments, and environmental studies.

Alternative names include wind meters, airflow testers, and velocity meters.

Explore Anemometers

 

Colorimeters

Colorimeters measure the absorbance of light to determine the concentration of substances in solutions. GAO Tek offers colorimeters with advanced optics and user-friendly interfaces, ensuring accurate laboratory and field measurements.

Applications include water quality testing, food and beverage analysis, and chemical formulation.

They are also known as photometers, optical analyzers, or color density meters.

Explore Colorimeters

 

Gas Analyzers

Gas analyzers detect and quantify the presence of gases in air or process streams. GAO Tek provides portable and stationary analyzers with high sensitivity, multi-gas detection, and real-time monitoring.

They are essential in industrial safety, emissions monitoring, laboratory testing, and environmental compliance.

Alternative names include gas detectors, gas monitors, and air analyzers.

Explore Gas Analyzers

 

Hygrometers

Hygrometers measure humidity levels in air or gases. GAO Tek’s hygrometers deliver precise readings with digital sensors and rugged housings, suitable for challenging environments.

Applications include climate research, building monitoring, storage facility management, and HVAC testing.

They are also referred to as humidity meters, moisture gauges, or relative humidity testers.

Explore Hygrometers

 

Infrared Thermometers & Cameras

Infrared thermometers and cameras measure surface temperatures by detecting infrared radiation. GAO Tek supplies handheld and advanced imaging models with high-resolution displays and non-contact measurement capabilities.

They are applied in industrial maintenance, electrical inspections, building diagnostics, and process monitoring.

Alternative names include IR thermometers, thermal cameras, and non-contact temperature meters.

Explore Infrared Thermometers & Cameras

 

Moisture Analyzers & Meters

Moisture analyzers and meters measure water content in solids, liquids, or gases. GAO Tek’s instruments use gravimetric, capacitive, or infrared drying methods for accurate moisture detection.

Applications include food production, pharmaceuticals, agriculture, and material testing.

They are also called humidity analyzers, moisture detectors, or water content testers.

Explore Moisture Analyzers & Meters

 

Radiation Meters

Radiation meters measure ionizing radiation levels, ensuring workplace safety and compliance with health standards. GAO Tek supplies portable radiation detectors with high sensitivity and real-time monitoring.

They are applied in nuclear facilities, medical radiology, research labs, and environmental monitoring.

Alternative names include Geiger counters, dosimeters, and radiological survey meters.

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Refractometers

Refractometers measure the refractive index of liquids or solids to determine concentration or purity. GAO Tek’s refractometers offer digital and handheld models for field and lab use.

Applications include food and beverage production, chemical analysis, and pharmaceutical quality control.

They are also referred to as concentration meters, optical refractometers, or Brix meters.

Explore Refractometers

 

Sound Level Meters & Calibrators

Sound level meters and calibrators measure acoustic levels in environments, ensuring compliance with noise regulations. GAO Tek’s meters are designed with wide frequency ranges, data logging, and precision microphones.

Applications include workplace safety monitoring, environmental noise surveys, and industrial noise analysis.

They are also known as noise meters, decibel meters, and acoustic testers.

Explore Sound Level Meters & Calibrators

 

Temperature & Process Calibrators

Temperature and process calibrators verify the accuracy of sensors, transmitters, and measurement instruments. GAO Tek’s calibrators offer multifunction capabilities, portable designs, and traceable accuracy.

They are used in industrial automation, laboratory calibration, and process control.

Alternative names include calibration instruments, process verifiers, or temperature calibrators.

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Temperature Data Loggers

Temperature data loggers continuously record temperature variations over time for monitoring and analysis. GAO Tek’s loggers provide high storage capacity, wireless connectivity, and durable enclosures.

Applications include cold chain monitoring, laboratory storage, and environmental research.

They are also referred to as thermal loggers, digital temperature recorders, or environmental data recorders.

Explore Temperature Data Loggers

 

Turbidimeters

Turbidimeters measure the cloudiness or haziness of a liquid caused by suspended particles. GAO Tek provides turbidimeters with high-sensitivity optics, digital calibration, and rugged portability.

They are applied in drinking water analysis, wastewater treatment, and environmental research.

Alternative names include turbidity meters, water clarity testers, and nephelometers.

Explore Turbidimeters

 

Other Environmental Testers

Other environmental testers encompass devices designed for specialized measurements, such as air particulates, light intensity, or soil properties. GAO Tek offers a range of instruments tailored to unique research and industrial needs.

These testers are used in agriculture, environmental science, industrial safety, and energy sectors.

They are also referred to as environmental meters, specialized testers, or ecosystem analyzers.

Explore Other Environmental Testers

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Other Product Categories We Offer

Structural Testers & Analyzers

Chemical & Water Testers & Analyzers

Networks Testers & Analyzers

Electrical Tester and Analyzers

Industrial PCs

GAO Tek Inc. provides these products and systems with robust R&D, ensuring reliability, scalability, and technical excellence to help industries achieve their goals.

Our products are in stock and can be shipped overnight to the Continental U.S. and Canada from one of our local warehouses. If you have any questions, our technical experts can help you. Please fill out this form or email us.