Description
The RHA-503ATC Handheld Battery/Anti Freeze/Clean Refractometer is a professional-grade optical measuring instrument designed to provide quick and accurate testing of battery electrolyte concentration and coolant freeze protection levels.
Unlike single-purpose refractometers, the RHA-503ATC combines four essential measurement scales into one compact instrument. It enables users to determine the specific gravity of battery electrolyte solutions while also measuring the freeze point protection of ethylene glycol antifreeze, propylene glycol antifreeze, and windshield washer cleaning fluids.
This makes the instrument particularly useful for automotive workshops, fleet operators, maintenance technicians, battery service centres, and industrial facilities that routinely inspect cooling systems and battery conditions.
The built-in Automatic Temperature Compensation (ATC) system automatically adjusts readings for ambient temperature variations between 10°C and 30°C, helping maintain measurement accuracy without manual corrections.
Operation is simple. A few drops of sample liquid are placed on the prism using the supplied pipette. The user then views the scale through the eyepiece to obtain an immediate reading. The refractometer can also be easily calibrated using distilled water and the supplied adjustment screwdriver, ensuring long-term measurement reliability.
Constructed from durable aluminium alloy, the RHA-503ATC is lightweight, portable, and designed for regular field or workshop use. It requires no batteries or external power source, making it a dependable solution for routine maintenance inspections.
Key Applications
- Automotive battery electrolyte testing
- Lead-acid battery maintenance and servicing
- Antifreeze coolant concentration checks
- Ethylene glycol freeze point testing
- Propylene glycol freeze point testing
- Windshield washer fluid freeze protection testing
- Vehicle maintenance workshops
- Fleet management and transport companies
- Industrial equipment maintenance
- Preventive maintenance programmes
Why Buy From Us
- Quality Measurement Instruments
We specialise in supplying reliable measurement and testing instruments for industrial, commercial, and maintenance applications. - Technical Product Support
Our team can assist with product selection and application enquiries to ensure you choose the right instrument for your requirements. - Fast Response to Enquiries
We strive to respond promptly to quotation requests and product enquiries. - 90 Days Warranty
The RHA-503ATC is supplied with a 90-day warranty for added peace of mind. - Local Singapore Supplier
Purchase confidently from a trusted Singapore-based supplier serving customers across Singapore and the region.
Standard Accessories
- RHA-503ATC Refractometer × 1
- Pipette × 1
- Mini Calibration Screwdriver × 1
- English User Manual × 1
- PVC Carrying Case × 1
Product Specifications
| Model | RHA-503ATC |
| Measurement Range (Ethylene Glycol) | -50°C to 0°C |
| Measurement Range (Propylene Glycol) | -50°C to 0°C |
| Measurement Range (Windshield Cleaning Fluid) | -40°C to 0°C |
| Measurement Range (Battery Electrolyte) | 1.100 to 1.400 sg |
| Division (Ethylene Glycol) | 5°C |
| Division (Propylene Glycol) | 5°C |
| Division (Windshield Cleaning Fluid) | 5°C |
| Division (Battery Electrolyte) | 0.01 sg |
| Accuracy (Ethylene Glycol) | ±5°C |
| Accuracy (Propylene Glycol) | ±5°C |
| Accuracy (Windshield Cleaning Fluid) | ±5°C |
| Accuracy (Battery Electrolyte) | ±0.01 sg |
| Automatic Temperature Compensation (ATC) | 10°C to 30°C |
| Calibration Method | Manual calibration via adjustment screw |
| Dimensions | 150 (L) × 29 (W) × 29 (D) mm |
| Weight | Approx. 140 g |





