| SLM-389 Wall Hanging Sound Level Meter 13" HD Screen Decibel Meter with Data Logger Function Audio and Visual Alarm | gainexpress.com | 149.9 USD | — | — |
| HTM-548 Digital Large Screen Hygrometer Temperature and Humidity Measurement with Adjustable Visual/Audible Alarms with External Sensor Indoor Tester | gainexpress.com | 84.9 USD | — | — |
| THE-373 K/J/T Datalogger Thermocouple Thermometer -200~1372°C (-328~2501°F), 4-Channel Display, Real-Time Data Logging, Audible and Visible Alarm, and ADJ Compensation | gainexpress.com | 79.9 USD | — | — |
| SLM-390 Decibel Meter with Data Logging function and A / C / Z Weighted Sound Meter Portable SPL Meter MAX/MIN/AVG, Data Hold Use for Home, Factory, Noisy Neighbor | gainexpress.com | 77.9 USD | — | — |
| LKD-398 Natural Gas Detector Gas Sniffer Gas Leak Detector Locating Propane, Natural Gas, and Combustible Gas Leak for Home and RV with Gooseneck Probe, Buzzer, Light Indicator | gainexpress.com | 72.9 USD | — | — |
| TAC-565 Laser Digital Tachometer 2-in-1 Contact & Non-Contact RPM Meter, Photo Tach with Real-Time PC Data Logging, 2000 Groups Memory, Adjustable Alarm for Motor Speed & Surface Speed Testing | gainexpress.com | 66.9 USD | — | — |
| HTM-482 Multi-Function Environmental Meter Thermo-Hygrometer Datalogging Temperature, Humidity and Wet Bulb Dew Point Measurement PC Connection Feature Record and Download | gainexpress.com | 60.9 USD | — | — |
| Digital Sound Level Meter A Frequency Weighting Decibel Noise Tester Sound Detector MAX/MIN/HOLD with Backlight 30-130dB Audio Measuring Instrument Alarm | gainexpress.com | 51.9 USD | — | — |
| Digital Lux Light Meter Photometer Datalogger Illuminometer High-precision Data Record Function 100000 Lux FC Foot Candle Handheld Illuminance Tester | gainexpress.com | 42.9 USD | — | — |
| TAC-401 Portable 2-in-1 Tachometer Noncontact Laser Photo Sensor Contact(3~19999RPM) & Non-contact(3~99999RPM) RPM Gauge Tester Professional Handheld Car Engine Tool | gainexpress.com | 39.9 USD | — | — |
| CAB-430 Fiber Optic Power Meter VFL REF FC SC ST Visual Fault Locator HD Colored LCD Display Fiber Optical Cable Tester Network Tools | gainexpress.com | 39.9 USD | — | — |
| THE-343 K/J/T Thermocouple Thermometer Dual Channel Temperature Meter Tester 4 K-Type Probes with Temperature Compensation and Alarm Function | gainexpress.com | 33.9 USD | — | — |
| HTM-483 Handheld Thermo-Hygrometer Ambient Temperature and Relative Humidity High Precision Measurement | gainexpress.com | 33.9 USD | — | — |
| TAC-455 Portable Non-Contact Tachometer 2.5~99999RPM High Precision with Analog Bar Scale and Alarm Function, Temperature Measurement for Machinery Car Motor engine Tool | gainexpress.com | 30.9 USD | — | — |
| THE-418_1P Digital K-Type Thermocouple Thermometer with Wired and Stainless Steel Probe, High and Low Temperature Measurement for High-Temp Furnaces and Ovens or Low-Temp Liquid Nitrogen etc | gainexpress.com | 28.9 USD | — | — |
| LUX-484 Lux Light Meter for Visible Brightness Measurement with 0.1~200000LUX / 0.01~20000FC Range Ideal for Warehouses, Factories, Hospitals, and Schools | gainexpress.com | 28.9 USD | — | — |
| ANE-486 Digital Air Velocity Meter High Precision Anemometer 0.3~30.0m/s, km/h, ft/m, mile/h, knots Units with Air Temperature Measurement | gainexpress.com | 28.9 USD | — | — |
| SLM-417 Digital Sound Level Meter 30~130dB Decibel Tester SPL Monitoring Audio Level Meter for Noise Monitoring in the School, Offices, Traffic, Factory, Home, etc. | gainexpress.com | 27.9 USD | — | — |
| LUX-429 Digital Light Lux Meter Illuminance Tester Photometer Luxmeter High Precision Illuminometer Lx FC Measurement for Photography, Schools, Hospitals, Workplaces and other Environmental Monitoring | gainexpress.com | 25.9 USD | — | — |