Best Gain Express in 2026

10X MAGNIFICATION , 2-IN-1 with 6 LED Light and 21mm triplet lens to enable achromatically and alphabetically corrected.

White LED light helps to look at inclusions, perfect light for viewing diamonds and other gemstones.

Made with the finest quality optics and with top quality metal cases

Measuring range of ±180° (0-360°) with ±0.1° repeatability

Working current: <100 µA

Guarantees fast & accurate measurement readings

This injector tester with 41.5cm/ 16.3 inches test lead can work with any fuel pressure tester. Please NOTE: Gasoline car only, NOT the diesel engine

4 MODES- Large LED display with 4 pulse modes- Short/ Medium/ Long/ Continuous modes help to identify good or bad injector.

DIAGNOSE INJECTOR PROBLEMS- you can use it to test each injector individually to help identifing stuck, leaking or burnt-out conditions. It works with engine off and pulse timer may be used with fuel pressure gauge.

【Easy to use】Transmitter and Receiver LEDs show open or short circuit conditions

【Check Short Circuit】Receiver: On/Off button / Test button / Probe length: 7" flexible probe

【Locate Open Circuit】Sender:Tone/Off/Cont (Continuity) switch / Tone/Cont (Continuity) LEDs / Red and black test leads cable (61cm length, approximate)

6 Optic wave length selection --- 850nm / 1300nm / 1310nm / 1490nm / 1550nm / 1625nm

Clear LCD display. Optional backlight supports night operation. FC converter for FC/SC/ST interface

Compact design, lightweight, easy to carry, operate and low power consumption

Measuring Range: 0~10 %Brix with 0.1% division and ±0.1%Brix accuracy

Measure sugar content of sap from maple tree trees and see how the sugar concentration can vary between trees and even between taps on the same tree.

Measure the total dissolve solids in soup or water-soluble glue

Portable design & easy to use, with 5 clearly defined scales for the following 3 main uses:

1. Measuring 1.10 to 1.40 kg/l specific gravity of battery acid and provide a quick reference of battery fluid condition (density of the electrolyte and each scale division corresponds to 0.01g/cm3)

2. Measuring -50 ~ 0°C freezing point of automobile antifreeze based on ethylene glycol or propylene glycol.

3 Scales in 1 : (1)Battery Fluids Specific Gravity (Density): 1.100 - 1.400kg/l ; (2) Ethylene Glycol Freezing Point: -60 ~ 0°C (66.6%~0%) ; and (3)Propylene Glycol Freezing Point: -50 ~ 0°C (62.4%~0%) 

Monitor reliability of your battery charge & health condition

Ensure all is working properly and not causing problems like rust, prone to freezing, poor charging, poor cooling, etc

Sharp cone point (SR 0.1mm), 30° Included Angle

Thickness of measured sample : > 6mm (no more than 3 layers)

Measuring Range / Graduation : 0~100 HD

K Temp. Range : -200 to 1370°C, -328 to 2498°F / Resolution: 0.1°C/°F / Accuracy (under 18~28°C ambient temp.) : ±(0.3%rdg + 1°C)

Sampling Rate : Programmable from 1 second up / LCD Size: 47 x 104mm

Operating Temp. : 0~50°C / Operating Humidity: <80%

Frequency response: 31.5~8.5KHz

Measurement range: 30~130dBA

Calibration sound source: 94dB @ 1kHz

10X SHARP FOCUS MAGNIFICATIONS - The optical lens of up to 10x zoom, the small details can be truly magnified without distortion. 25mm Fiel of View to provide a larger viewing area that allow you convenient to check.

SUPER CLEARLY & HIGH TRANSMITTANCE - It has 8 LED Lights ,which can clearly magnify the details, will not easy to cause visual fatigue even you use for a long time.

Can also be attached with 8 different glass scale charts for different measuring range applications

1. Advance with 4.7mm Tube connector, silicone tubing with 3mm inner diameter and 5mm outer diamter

2. 11 selectable units of measurement kPa, psi, kgfcm2, ozin2, bar, mbar, inHg, mmHg, inH2O, ftH2O, cmH2O.

3. Features like Data Hold, Error code Functions, auto power off disabled, LCD backlit dual display, Zeroing, offset and data compensation.

LIGHTWEIGHT - This digital level weighs 280g only, which is similar to the weight of a 5.5 inch

360˚ MEASURING RANGE - Measure slope angles 4 x 90˚ (total 360˚)

4 STRONG MAGNETS - Magnetic base can be securely attached to metal surfaces

Soil pH measuring range : 3 - 8 pH

SOIL PH TESTER. Helps you measure and control PH level in soil

Accuracy : ± 0.2 pH

2 IN 1 FUNCTIONS: Test pH and moisture level in different kinds of soil.

ACCURATE & DURABLE: Soil pH measuring range 3~8 pH with Accuracy ± 0.2 pH (suitable for agriculture field or educational experiments)

LONG ELECTRODE: Longer and slender 308mm electrode for deep penetration into the soil and is made of metal that is waterproof.

Inexpensive and practical device with 1 point calibration, easy to use and highly accurate

Measurement range: -1999 ~ 1999 mV in steps of 1 mV

Easily find out the kind of water you are drinking and how effectively & efficient your filter works

CE Certified & RoHS Compliant

PC Interface :Compatible with Windows 10, 8, 7, Vista and XP

32000 Reading Internal Memory (Data record function)

Two output levels of 94dB and 114dB with Output frequency of 1000±0.1%Hz (allows calibration with A,B,C or D weighting networks or linear)

Fits ½ inch and 1 inch microphones (includes ½ inch adapter)

Easy One handed operation with low battery indicator

FEATURES: Large screen monitor with smart backlight which allows you to read easily even in dark sorroundings. pH and Temperature display with low battery indicator and the unit operates power saving mode.

Multi-points Calibration: Up to 3 Points PH calibration (pH 7.0 / pH 4.01 / pH 10.01). It has advance one touch calibration function with automatic buffer recognition to avoid errors.

ATC (Automatic Temperature Compensation): The monitor has ATC function so it will decrease the error of PH readings caused by the fluctuation of water temperature.

SET WITH 4 THERMOCOUPLES- 2 Thermocouples with bead-type tips and 2 Extra Stainless Steel Thermocouples 

WIDE MEASUREMENT TEMPERATURE RANGE - Range of the main unit is -50°C ~ 1300°C (-58°F ~ 2372°F); Includes 2 thermocouples that can measure from -50 to 400°C (-58 to 752°F). Comes with °C, °F and K temperature modes

HIGH MOBILITY & EASY OPERATION - Battery-operated, portable and built-in foldable stand and only operate with 6 simple buttons with clear indications, suitable for beginners and professional users. Factory calibrated. Has reset to factory setting

MEASURING RANGE: 0~9999 ppm or 10.0ppt~100.0ppt or 0.0%~10.0% or 0.950~1.080 (S.G.) based on NaCl with ±%F.S ±1 digit / ±0.5°C Accuracy

DISPLAY: Dual Temperature and Salinity in four measurement units (ppm, ppt, %, S.G) / 30 x 18mm LCD Size

APPLICATION: Salinity measurement in fish pond, tank, aquariums, laboratories, food processing, hydroponics, Aquaculture, and other water monitoring facilities.

【Wide Range】Salinity: 0.00~10.0 ppt (NaCL) and 10.1~70.0ppt (NaCL) ; Temperature Compensation: 0~50°C

【High Accuracy】Multi point calibration guarantees full range accuracy

【Functional Design】IP65 Waterproof housing with built-in NaCL temperature coefficient, conductivity to TDS conversion factor and data holding

Measure 5 parameters, continuously monitoring shows readings on its large-screen triple display with backlight. Powered by its rechargeable battery (installed in the main unit) or the power adapter included which supports a long period of monitoring. 

Measurement Range: EC: 0.00~19.99EC; pH: 0.00~14.00pH; CF: 0.0~199CF; Temp: 0~55°C (32~131°F); TDS: 10~19990ppm

Proven high accuracy and Auto Temperature compensation (ATC), comes with removable BNC electrode

Measuring Range: 4 x 90 degree , mm/m : 1000mm/m,% : 100%, in/ft : 12in/ft

Accuracy: 0 degree and 90 degree: 0.1 degree, the rest: 0.2 degree

Resolution: 0.05 degree

【Multifunctional Meter】This air quality meter may give a accurate reading of CO2 concentration, humidity and temperature, the measuring range of CO2 is 0~9999ppm

【High-precision】Built-in NDIR CO2 sensor, the accuracy is ±50ppm of the CO2 level, which ensuring the reliability and long-term stability.

【Air Quality Level Indicator】This CO2 Detector designed as 3 stages of CO2 concentration: GOOD(0~700ppm); NORMAL (700~1000ppm); POOR(1000~9999ppm); Users can also custom setting the ppm value of the alarm indicator.

It has an AC-powered built-in LED light source that provides long lasting ideal illumination

An instrument specially designed for analyzing and viewing if a gemstone is doubly (anisotropic) or singly (isotropic) refractive

Detecting strain diamonds and other gems and separating synthetic amethyst from genuine

Cable Tested : RJ45/RJ11/BNC/USB/1394 and other different types

Cable Detected : RJ45/RJ11/BNC/USB/1394/ STP/UTP /Twin Twisted Cable/Coaxial Cable/Telephone Line and other metal wires

Operating Environment : -10 ~ 60°C

Dichroscope can be used in the jewels fields. 

Show whether or not a stone is dichroic (reflects 2 colors).

Calcite Type Dichroscope with 15mm diameter and 60mm in length 

PLUG-IN DESIGN: Simply plug the meter into the wall socket then plug the appliance into the power meter. It helps user in saving money and energy by identifying power consumption of each appliance. It has wide working voltage range of 100~260V.

DISPLAY: Large LCD display with backlight function making it easy to read data even in the dark. Screen shows the Watt, Current, Voltage, Frequency, Power Factor and CO2 emission volume.

OPERATION: Button is designed for easy operation and very convenient for daily monitoring of electrical appliances thus making the energy consumption clear.