Gain Express Manuals & User Guides

GAIN EXPRESS Temperature USB Data Logger User Manual

August 4, 2026

Product Informaton Product Name: Temperature USB Data Logger Specifications:Accuracy............... ±0.2℃(0℃~+65℃);Others: See chart below Range............... -40℃~+125℃ Resolution............... 0.1℃ Storage capacity............... 32000 groups of data Sampling interval............... 1 s~24 hours Start mode............... Start immediately; Timing start Stop mode............... Memory full; When into USB…

Brand: Gain Express

GAIN EXPRESS SLM-442 Digital Sound Level Meter User Manual

July 16, 2026

GAIN EXPRESS SLM-442 Digital Sound Level Meter Specifications Technical Details Manufacturer ‎Gain Express Holdings Ltd. Part Number ‎SLM-442 Item Weight ‎4.3 ounces Product Dimensions ‎6.29 x 2.2 x 1.22 inches Item model number ‎SLM-442 Batteries ‎1 AAA batteries required. Item…

Brand: Gain Express

GAIN EXPRESS E-1325M pH Electrode Probe Instruction Manual

March 17, 2026

GAIN EXPRESS E-1325M pH Electrode Probe GENERAL DESCRIPTION This electrode is a combined electrode by a glass electrode and reference electrode; it is a PH value measuring sensor. It is widely used in the measurement of solution PH value. The…

Brand: Gain Express

Gain Express 455_E Non Contact Measurement Meter Instruction Manual

March 18, 2025

Gain Express 455_E Non-Contact Measurement Meter Product Specifications Non-contact measurement Data hold, max/min/avg measurement function Auto power off and cancel auto power-off function Hi, Low alarm limit setting function Backlight and color backlight alarm function Temperature measurement function Analog bar…

Brand: Gain Express

Gain Express 6380_E Vibration Meter Instruction Manual

March 17, 2025

Gain Express 6380_E Vibration Meter FEATURES Uses piezoelectric acceleration transducer to convert vibration signal. In accordance with ISO 2954,GB13823.3, used for periodic measurements, to detect out-of-balance,misalignment and other mechanical faults in rotating machines. Specially designed for easy on site vibration…

Brand: Gain Express

Gain Express BAT-377 Battery Tester Instruction Manual

July 8, 2024

Gain Express BAT-377 Battery Tester INTRODUCTION The Gain Express BAT-377 Battery Tester is a must-have for anyone whose devices run on batteries. This small and useful tester makes sure that your batteries are always in great shape, no matter if…

Brand: Gain Express

GAIN EXPRESS SLM-442 Digital Sound Level Meter User Manual

manual • May 3, 2026

User manual for the GAIN EXPRESS SLM-442 Digital Sound Level Meter, covering specifications, operation instructions, PC software setup, and calibration procedures.

Brand: GAIN EXPRESS

Gain Express EMF-280 Electromagnetic Wave Meter User Manual

EMF-280 • August 8, 2026 • Amazon

Comprehensive user manual for the Gain Express EMF-280 Electromagnetic Wave Meter, providing instructions for setup, operation, maintenance, troubleshooting, and detailed specifications for accurate electromagnetic field detection.

Brand: GAIN EXPRESS

Gain Express HTM-238 Handheld Digital Humidity & Temperature Meter User Manual

HTM-238 • July 24, 2026 • Amazon

Comprehensive user manual for the Gain Express HTM-238 Handheld Digital Humidity and Temperature Meter, covering setup, operation, specifications, and maintenance.

Brand: Gain Express

GAIN EXPRESS WQM-397 5-in-1 Water Quality Tester Instruction Manual

WQM-397 • June 22, 2026 • Amazon

Comprehensive instruction manual for the GAIN EXPRESS WQM-397 5-in-1 Water Quality Tester, detailing setup, operation, calibration, and maintenance for pH, TDS, Salinity, Specific Gravity, and Temperature measurements with WiFi app monitoring. Ideal for aquariums, hydroponics, pools, and aquaculture.

Brand: GAIN EXPRESS

GAIN EXPRESS Professional Sound Level Meter SLM-24 Instruction Manual

SLM-24 • April 29, 2026 • Amazon

Instruction manual for the GAIN EXPRESS Professional Sound Level Meter, model SLM-24. Learn about setup, operation, maintenance, troubleshooting, and specifications for accurate sound level measurements from 30dB to 130dB.

Brand: GAIN EXPRESS

GAIN EXPRESS Digital Car Window Tint Meter WTM-1100 Instruction Manual

WTM-1100 • March 25, 2026 • Amazon

Comprehensive instruction manual for the GAIN EXPRESS WTM-1100 Digital Car Window Tint Meter. Learn about setup, operation, maintenance, and specifications for accurate visible light transmission measurements.

Brand: GAIN EXPRESS

Gain Express Dissolved Oxygen Meter Model 8403_FBACO Instruction Manual

8403_FBACO • March 24, 2026 • Amazon

This manual provides comprehensive instructions for the Gain Express Dissolved Oxygen Meter, Model 8403_FBACO. It covers setup, operation, maintenance, troubleshooting, and technical specifications for accurate dissolved oxygen measurements.

Brand: Gain Express

Gain Express Digital Handheld Stroboscope DT-2350PA Instruction Manual

DT-2350PA • March 10, 2026 • Amazon

Comprehensive instruction manual for the Gain Express Digital Handheld Stroboscope DT-2350PA, covering setup, operation, specifications, maintenance, and troubleshooting for accurate rotational speed measurement and defect detection.

Brand: Gain Express

Gain Express 8-in-1 Bluetooth Soil Meter Instruction Manual

8-in-1 Soil Meter • February 28, 2026 • Amazon

Comprehensive instruction manual for the Gain Express 8-in-1 Bluetooth Soil Meter, covering setup, operation, maintenance, troubleshooting, and specifications for pH, EC, Salt, Fertility, Moisture, Humidity, Temperature, and Light measurements.

Brand: Gain Express

Gain Express FFW335 Wireless Sonar Fish Finder Instruction Manual

FFW335 • February 12, 2026 • Amazon

Comprehensive instruction manual for the Gain Express FFW335 Wireless Sonar Fish Finder, covering setup, operation, maintenance, and specifications.

Brand: Gain Express

Gain Express Automotive Circuit Tester (Model E04-036) - User Manual

E04-036 • February 11, 2026 • Amazon

Comprehensive user manual for the Gain Express Automotive Circuit Tester (Model E04-036). Learn how to accurately trace wires, detect open and short circuits, and troubleshoot automotive electrical systems safely and efficiently.

Brand: Gain Express

GAIN EXPRESS PHC-342_EU Digital pH/ORP/Temperature 3-in-1 Water Quality Controller User Manual

PHC-342_EU • January 30, 2026 • Amazon

This manual provides instructions for the GAIN EXPRESS PHC-342_EU Digital pH/ORP/Temperature 3-in-1 Water Quality Controller. It covers features such as Wi-Fi connectivity for remote monitoring, 24/7 real-time data display, alarm functions, and output relay control for external devices. The controller is designed…

Brand: GAIN EXPRESS

GAIN EXPRESS SLM-267 Small Digital Sound Level Meter User Manual

SLM-267 • January 22, 2026 • Amazon

Comprehensive instruction manual for the GAIN EXPRESS SLM-267 Small Digital Sound Level Meter, covering setup, operation, features, specifications, and maintenance.

Brand: GAIN EXPRESS

Professional Digital Sound Level Meter SLM-390 User Manual

SLM-390 • 1 PDF • August 9, 2026 • AliExpress

Comprehensive user manual for the GAIN EXPRESS SLM-390 Digital Sound Level Meter, including setup, operation, specifications, maintenance, and troubleshooting.

Brand: GAIN EXPRESS

PAR-380 Digital Quantum PAR Meter User Manual

PAR-380 • 1 PDF • May 11, 2026 • AliExpress

User manual for the PAR-380 Digital Quantum PAR Meter, designed to measure Photosynthetically Active Radiation (PAR) flux within the 400 to 700nm wavelength range. Includes setup, operating instructions, data logging, calibration, troubleshooting, and specifications for optimal plant growth monitoring.

Brand: GAIN EXPRESS

Dual Relay Digital pH Controller PHC-402 Instruction Manual

PHC-402 • March 12, 2026 • AliExpress

Comprehensive instruction manual for the GAIN EXPRESS PHC-402 Dual Relay Digital pH Controller, covering setup, operation, maintenance, troubleshooting, and specifications for precise pH control in various applications like hydroponics and aquariums.

Brand: GAIN EXPRESS

SQM-457 8-in-1 Multifunctional Soil Meter Instruction Manual

SQM-457 • February 23, 2026 • AliExpress

Comprehensive instruction manual for the GAIN EXPRESS SQM-457 8-in-1 Multifunctional Soil Meter, covering setup, operation, maintenance, specifications, and warranty information for optimal plant care.

Brand: GAIN EXPRESS

WQM-369 6-in-1 Bluetooth Water Quality Tester Instruction Manual

WQM-369 • November 9, 2025 • AliExpress

Comprehensive instruction manual for the GAIN EXPRESS WQM-369 6-in-1 Bluetooth Water Quality Tester, covering setup, operation, maintenance, specifications, and troubleshooting for pH, EC, ORP, Free Chlorine, Salinity, and Temperature measurements.

Brand: GAIN EXPRESS

PHM-245 pH and Temperature Monitor User Manual

PHM-245 • October 31, 2025 • AliExpress

Comprehensive user manual for the PHM-245 pH and Temperature Monitor, including setup, operation, calibration, maintenance, specifications, and troubleshooting.

Brand: GAIN EXPRESS