| SRT-6200S Digital Surface Roughness Tester Meter Gauge Ra Rq Rz Rt 4 Parameters | gainexpress-dealer.com | 528.8 USD | — | — |
| VM-6380-3 Landtek Multi Channel Vibration Meter Piezoelectric Sensor Transducer 10Hz~10kHz Frequency | gainexpress-dealer.com | 440.7 USD | — | — |
| HM-934-1 Indentation Barcol Hardness Tester 0~100 HBa Meter Brinell 25~150HB | gainexpress-dealer.com | 352.5 USD | — | — |
| WA-60A Landtek Water Activity Meter Food Water Activity Measurement Portable Digital Tester | gainexpress-dealer.com | 340 USD | — | — |
| 88170 High-Temp Data Logger with PDF Report PT1000 Sensor, IP68 Waterproof, Auto-Generates Graphs & Excel | gainexpress-dealer.com | 309 USD | — | — |
| Mini Pro Series OTDR: Compact and Multifunctional Fiber Optic Tester OPM, LS, VFL, RJ45 Cable Tracking for FTTX, Network Construction, etc. | gainexpress-dealer.com | 202.9 USD | — | — |
| TM-1240 Digital Ultrasonic Thickness Meter 0.75~400mm Tester Gauge Steel Cast Iron Glass PVC Brass | gainexpress-dealer.com | 182.5 USD | — | — |
| VM-213 Vibration Meter Tester Piezoelectric Sensor Measuring Acceleration, Velocity and Displacement | gainexpress-dealer.com | 182.5 USD | — | — |
| TC-8100 Digital Handheld Dust Particle Counter PM2.5, PM10 AQI Tester Data Logging Function up to 999 Set | gainexpress-dealer.com | 173.9 USD | — | — |
| PHC-402 Dual Relay Digital pH Controller with Temperature Compensation UP and DOWN Adjustable Dosing for Aquarium, Hydroponics System and Indoor Plant Grow | gainexpress-dealer.com | 171.9 USD | — | — |
| HT-6510N Digital Screen Tension Meter Tester 7~40 N/cm Wire Steel Mesh Frame | gainexpress-dealer.com | 170 USD | — | — |
| TM-197 AC / DC Gaussmeter Magnetic Field Strength Meter Teslameter Magnetometer | gainexpress-dealer.com | 161.39 USD | — | — |
| THE-494 Mobile Infrared Thermal Imager - Smart Thermal Imaging & Temperature Measurement Android Type C Mobile Phone Photo Video Capture Camera Thermometer | gainexpress-dealer.com | 156.9 USD | — | — |
| Professional 8-in-1 Fiber Optic Tester Multifunctional OTDR for FTTx and Network Maintenance 3.5-inch Display Screen, Rechargeable, 600 Internal Storage | gainexpress-dealer.com | 150.9 USD | — | — |
| TM-747D Digital 4-Channel K /J/ T / E/ R / S/ N Type Thermocouple Thermometer Datalogger 16,800 Data Logging T1/T2, T3/T4 Input Terminal Data Logger | gainexpress-dealer.com | 146.9 USD | — | — |
| Industrial Paperless Recorder Data Logger Temperature Pressure Current Voltage Smart Recorder | gainexpress-dealer.com | 143.33 USD | — | — |
| WQM-526 Digital Water Testing Kit for Hot Tub, Pools & Spas Water Tester Measures pH, Free Chlorine, Total Alkalinity, Bromine, Cyanuric Acid, Total Chlorine, Total Hardness with Water Analyzer and Test Strips | gainexpress-dealer.com | 135.9 USD | — | — |
| GAM-330 Radiation Dosimeter Nuclear Medical Beta Gamma X Ray Detector Tester Metal Nuclear Geiger Counter with Alarm | gainexpress-dealer.com | 128.12 USD | — | — |
| 7729 Wall Mount / Desktop Stand Indoor Air Quality Monitor Real-time CO2 Detector, Carbon Dioxide & Temperature & Humidity Level with Large LED Screen & Visual Color Warning Light Bar and Audible Alarms | gainexpress-dealer.com | 126.92 USD | — | — |
| MS-120 Landtek Digital Mechanic's Engine Stethoscope with Headphone & 2 Separate Sensor Probe 10~10K Hz | gainexpress-dealer.com | 121.1 USD | — | — |
| OZX-1KNT24 Ozone Generator 1000mg/h Purifier Drinking Water | gainexpress-dealer.com | 118.9 USD | — | — |
| 7530 Digital CO2 Carbon Dioxide IAQ Monitor Controller with Relay Function 4.5M Cable NDIR Sensing Probe for Green House Home, Office, Factory | gainexpress-dealer.com | 117.9 USD | — | — |
| AZ87786 WBGT (Wet Bulb Globe Temperature) Heat Stress Meter Datalogger | gainexpress-dealer.com | 115.9 USD | — | — |
| WM-106 Digital Whiteness Meter 0 ~ 120, Portable Leucometer Tester 254 Data Memory | gainexpress-dealer.com | 114.7 USD | — | — |
| HT-1292 Digital Humidity Temperature Meter Tester Indoor Outdoor, 10~95%RH Temp -10~60 °C (14~140°F) with Wet Bulb Temp | gainexpress-dealer.com | 114.7 USD | — | — |
| TM-209 Digital LED Light LUX / FC (Footcandle) Meter Luminous Intensity Measurement Luxmeter | gainexpress-dealer.com | 111.9 USD | — | — |
| LUX-510 Portable Spectral Illuminance Meter Light Lux Tester with Spectral Sensor Measuring CRI, CCT, Blue Light, UV Index, Temperature, Humidity | gainexpress-dealer.com | 109.9 USD | — | — |
| AQM-356 CO2 Controller & Monitor Auto Detect Day Night Carbon Dioxide CO2 Meter with 15ft Remote Dual Beam NDIR Sensor for Greenhouse, Grow Rooms, Hydroponics Rooms | gainexpress-dealer.com | 99.26 USD | — | — |
| PAR-414 Full-Spectrum Quantum PAR Meter Waterproof Sensor IP68 for Aquarium Reef Tank Plants PPFD Tester Indoor Plants, Garden, Farm, Hydroponics Photosynthetic Activity | gainexpress-dealer.com | 97.9 USD | — | — |
| MNG-549 Digital Refrigerant Manifold Gauge Set, 800PSI HVAC Vacuum Pressure Tester with Pressure Holding Leak Test Function, Backlight LCD Display, Supports 88 Refrigerants for R410A R134A R22 R32 R290 R1234YF | gainexpress-dealer.com | 96.9 USD | — | — |
| AQM-434 Gas Leak Detector 4-in-1 H2S|EX|O2|CO Tester Analyzer Instant Alerts Audible, Light, Vibration Alarm Natural Methane Gas Detector IP68 with Data Storage Portable Rechargeable | gainexpress-dealer.com | 94.9 USD | — | — |
| AQM-419 Dual-Output CO2 Controller Carbon Dioxide Monitor with Day & Night Auto Detection, Temperature and Humidity Measurement, 15ft Remote NDIR CO2 Sensor, and Trend Chart for Greenhouses, Offices, Factories, Homes, etc. | gainexpress-dealer.com | 92.9 USD | — | — |
| AQM-410 Portable 8-in-1 Indoor Air Quality Monitor CO2/TVOC/HCHO/AQI/PM2.5/PM10/Temp/RH with Time Clock Display in Large Color LCD Screen | gainexpress-dealer.com | 91.9 USD | — | — |
| AQM-388 Portable 9 in 1 Indoor Air Quality Meter CO2 Monitor Formaldehyde Detector VOC Sensor AQI Index PM2.5 PM10 and Humidity Temp with Time Display Air Monitor Test Kit | gainexpress-dealer.com | 90.64 USD | — | — |
| TM-214 Digital Window Tint Meter 100% Visual Light Transmission 4000 Continuous Measurement 6.5mm Thickness Portable Device for Car Window Vehicle Curtains | gainexpress-dealer.com | 90.38 USD | — | — |
| GED-2600P Digital Gasoline Engine Non Contact Tachometer 50.0~9,999 r/min | gainexpress-dealer.com | 89.2 USD | — | — |
| WQM-553 8-in-1 Wifi Tuya Smart Swimming Pool Water Monitor for pH / Temperature / TDS / Electrical Conductivity / Salinity / Chlorine / Specific Gravity / ORP for Pool, Spa, Tubs | gainexpress-dealer.com | 87.9 USD | — | — |
| VBT-281 Digital Vibration Meter Piezoelectric Vibrometer Gauge Colored Flip Display | gainexpress-dealer.com | 87.72 USD | — | — |
| DOM-383 Digital Rechargeable DO Meter Dissolved Oxygen Tester with Floating Probe Long Cable Electrode, ATC | gainexpress-dealer.com | 83.33 USD | — | — |
| AQM-345 Smart Indoor Air Quality Monitor CO2 Meter, TVOC, Humidity, Temperature, PM2.5, PM1.0 with Relay Output APP Control Meter for Home Offices Schools | gainexpress-dealer.com | 83.33 USD | — | — |