Precision Optical Instruments for Industry & Agriculture

G-Tech Co., Ltd is a high-tech enterprise integrating development, production, and marketing of precision optical instruments since 1999. Trusted by professionals worldwide for reliable fruit penetrometers, hand-held refractometers, fiber optic inspection tools, and gem testing devices.

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1000+

Products Manufactured

25+ Years

Industry Experience

60+ Countries

Global Reach

About G-Tech Co., Ltd

Founded in 1999, G-Tech Co., Ltd is a high-tech precision optical instrument enterprise integrating development, production, and marketing. We are dedicated to adding value to our customers by combining superior technology with unparalleled support.

Our core product lines include fiber optic inspection microscopes, refractometers (Brix, salinity, honey, alcohol, antifreeze), gem refractometers, and fruit penetrometers. We also provide OEM/ODM services and have a strong R&D team focused on innovation and quality.

ISO-Certified Manufacturing
Global Distribution Network
Expert Technical Support

Our Premium Products

Explore our wide range of precision optical instruments designed for agriculture, gemology, fiber optics, and industrial testing.

$Abbe Refractometer 2WAJ$

Abbe Refractometer 2WAJ

High-precision laboratory refractometer for accurate measurement of refractive index and Brix values.

Measurement Range: 1.3000–1.7000nD
Temperature Compensation Included
Sturdy Metal Housing

$Hand-held Refractometer RHW-25ATC$

RHW-25ATC Hand-held Refractometer

Portable Brix refractometer with automatic temperature compensation for field use.

Range: 0–25% Brix
ATC: 10–30°C
Waterproof & Durable Design

GY-3 Fruit Penetrometer

Digital fruit firmness tester for apples, pears, peaches, strawberries, and more.

Measurement Range: 0.2–4 kg
Digital Display with Data Hold
Includes 10mm Probe

Visual Fault Locator VFL-6S

High-power red laser fault finder for fiber optic network troubleshooting.

Laser Wavelength: 650nm
Output Power: >5mW
Visible up to 5km

VFL-4S Visual Fault Locator

Compact and lightweight VFL for quick fiber identification and continuity checks.

Red Laser: 650nm
Battery Operated (AAA)
Pen-Style Design

$Digital Refractometer WZB-B$

Digital Refractometer WZB-B

Advanced digital refractometer with LCD display and precise Brix/salinity measurement.

Range: 0–85% Brix
Automatic Temperature Compensation
Waterproof IP65 Rating

$Gem Refractometer CL-181FL$

Gem Refractometer CL-181FL

Professional gem testing device with built-in LED flashlight for accurate refractive index readings.

Range: 1.30–1.81 nD
Includes Contact Liquid
Portable & Field-Ready

$RHA-503abATC AdBlue Refractometer$

AdBlue Refractometer RHA-503abATC

Specialized refractometer for measuring urea concentration in diesel exhaust fluid (AdBlue).

Range: 0–50% Urea
ATC Function
Quick & Accurate Results

GY-4 Digital Fruit Firmness Tester

Advanced digital penetrometer for general fruit firmness testing with data logging capability.

Digital Display with Memory
Adjustable Force Range
USB Output Option

Benchtop Fiber Inspection Microscope

High-magnification microscope for detailed inspection of fiber optic connectors and end-faces.

Magnification: 200X–400X
LED Illumination
Adjustable Focus & Stage

$Clinical Protein Refractometer RHC-200ATC$

Clinical Protein Refractometer RHC-200ATC

Designed for veterinary and clinical labs to measure total protein in serum and urine.

Range: 0–12 g/dL
ATC for Lab Accuracy
Easy to Calibrate

UV Viewing Cabinet

Safe enclosure for UV fluorescence inspection of gemstones, minerals, and forensic samples.

UV Wavelength: 365nm
Interlock Safety Switch
Compact & Portable

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Why Choose G-Tech Optic?

We combine cutting-edge technology, rigorous quality control, and customer-focused service to deliver unmatched value.

Quality Guaranteed

Every product undergoes strict quality control and testing before shipment.

Innovative Design

Our R&D team continuously improves product performance and usability.

Competitive Pricing

Direct factory pricing with no middlemen ensures best value.

Global Support

Dedicated service and technical assistance available worldwide.

Frequently Asked Questions

What is a fruit penetrometer used for?

A fruit penetrometer measures the firmness or ripeness of fruits like apples, pears, and peaches. It helps determine optimal harvest and storage times.

Do your refractometers have automatic temperature compensation (ATC)?

Yes, most of our hand-held refractometers include ATC to ensure accurate readings across varying temperatures.

Can I get a custom (OEM/ODM) version of your products?

Yes, we offer OEM and ODM services. Contact us with your requirements for branding, packaging, or design modifications.

How do I calibrate a refractometer?

Most models are calibrated using distilled water (0% Brix). Place 2–3 drops on the prism, close the cover, and adjust the calibration screw until the scale reads zero.

What is the warranty on G-Tech products?

We offer a standard 1-year warranty on all instruments. Extended coverage may be available upon request.

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