At Fuzhou Lindian Technology, we provide durable and reliable tools for industrial monitoring and quality control, including handheld refractometers and industrial endoscopes. Built for demanding environments, our instruments help professionals maintain process efficiency, equipment performance, and product consistency.
Refractometers for Cutting & Grinding Fluids
Our handheld refractometers are used to measure the concentration of water-soluble cutting fluids, grinding fluids, and coolants. Accurate fluid concentration ensures:
We offer models with various measurement ranges and scales to suit different metalworking fluids and industrial formulations. These refractometers are compact, easy to operate, and require no external power—ideal for shop-floor testing.
Industrial Endoscopes
Our industrial endoscopes (borescopes) are designed for visual inspection of hard-to-reach areas, such as engines, pipelines, and machinery interiors. With features like:
They are essential tools for preventive maintenance, diagnostics, and quality assurance across automotive, aerospace, manufacturing, and energy sectors.
Brix Refractometers
| Categories | Suitable Samples | Measurement sample range | RI/Brix | Materials | Model |
| Low Concentration Models | Fully synthetic cutting fluid, precision grinding fluid, weakly alkaline or neutral cleaning agents for PCB board cleaning, low-concentration bulk drug diluents, buffer solutions, environmental monitoring fluids | Brix 0-5% | 1.330-1.336 | Using solid copper for key parts like the prism base and eyepiece | RHB-5A |
| Brix 0-10% | 1.330-1.348 | RHB-10A | |||
| Brix 0-18% | 1.330-1.361 | RHB-18A | |||
| Brix 0-20% | 1.330-1.364 | RHB-20A | |||
| Standard Models |
Emulsified or semi-synthetic cutting fluids, grinding fluids, metalworking fluids, seasoning liquids in canning processing, and pickling liquids | Brix 0-32% |
1.330-1.385 | Using solid copper for key parts like the prism base and eyepiece |
RHB-32A |
| Brix 0-55% |
1.330-1.431 | RHB-55A |
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| High Concentration Models | Concentrated mother liquor of cutting fluids and grinding fluids, chemical raw material stock solution, concentrated liquids in the food industry | Brix 28-62% | 1.376-1.447 | Using solid copper for key parts like the prism base and eyepiece | RHB-62A |
| Brix 0-80% | 1.330-1.496 | RHB-080A |
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| Brix 45-82% | 1.411-1.523 | RHB-82A |
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| Brix 58-90% Baume 38-43 Water 12-27% |
1.437-1.491 |
RHB-90A | |||
| Brix 58-92% | 1.437-1.518 | RHB-92A |
Coolant Refractometers
| Categories | Temperature Unit | Suitable Samples |
Measurement sample range | Materials |
Model |
|
Ultimate 5 in 1 Ethylene Glyco Propylene Glycol Battery Fluid DEF (Adblue) Windshield Cleaner Fluid |
Celcius ℃ | Vehicles or industrial equipment suitable for extremely cold winter environments such as Northern Europe and Russia, conventional lead-acid batteries, medium and low temperature cleaning agents |
Ethylene -50℃ to -25℃ Propylene -50℃ to -25℃ Battery Fluid 1.100-1.300sg DEF 30-35% Cleaner -40℃ to -10℃ |
Using solid copper for key parts like the prism base and eyepiece
|
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| Mixed working conditions in temperate to frigid regions, full-range battery testing, DEF stock solutions and dilutions, universal anti-freeze cleaning agents |
Ethylene -50℃ to 0℃ Propylene -50℃ to 0℃ Battery Fluid 1.100-1.400sg DEF 0-40% Cleaner -40℃ to 0℃ |
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4 in 1 Ethylene Glyco Propylene Glycol Battery Fluid Windshield Cleaner Fluid |
Celcius ℃ | Automobiles/industrial equipment suitable for regions with moderately low winter temperatures such as northern China and Canada, conventional lead-acid battery fluid, medium and low temperature cleaning agents |
Ethylene -50℃ to 0℃ Propylene -50℃ to 0℃ Battery Fluid 1.150-1.300sg Cleaner -40℃ to 0℃ |
Using solid copper for key parts like the prism base and eyepiece
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| Designed specifically for extremely cold winter regions such as Northern Europe and Russia |
Ethylene -60℃ to 0℃ Propylene -50℃ to 0℃ Battery Fluid 1.100-1.400sg Cleaner -40℃ to 0℃ |
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| High-rate power batteries (such as those for electric forklifts) and deep-cycle energy storage batteries, high-rate power batteries and deep-cycle energy storage batteries |
Ethylene -50℃ to 0℃ Propylene -50℃ to 0℃ Battery Fluid 1.100-1.400sg Cleaner -40℃ to 0℃ |
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| Fahrenheit (°F) | Customized for the North American market, compatible with heavy machinery |
Ethylene -70℉ to 32℉ Propylene -60℉ to 32℉ Battery Fluid 1.100-1.400sg Cleaner -40℉ to 32℉ |
Industrial Endoscope Videoscope
| Applicable Scenarios | Probe Diameter | Probe Length |
Articulation Direction | Image Sensor Type | Model |
| Automotive and Machine Maintenance, Piping Inspection, Plumbing, Construction, Aerospace and Marine | 4 mm (0.157 in) | 1m (3.28 ft) | 2-way±120° |
CMOS | The two-way articulating industrial borescope |
| 6 mm (0.236 in) | up to 3m (9.84 ft) | ||||
| Pipeling and Plumbing Inspection, Automotive and Machine Mintenance, Aerospace Maintenance, Building and Infrastructure Assessment, Manufacturing Equipment Maintenance | 6 mm (0.236 in) | up to 2m (2.56 ft) | 4-way ±120° | The four-way articulating industrial borescope | |
| 7.5 mm (0.295 in) | up to 3m (9.84 ft) |
Address : Fuzhou, China
Call Us: +86-28056201
Email: shawnlin@refractometer.com.cnEmail: sales@refractometer.com.cn
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