ATAGO PAL-91S Ethylene Glycol Refractometer | Coolant Concentration Tester

ATAGO PAL-91S Ethylene Glycol Refractometer | Coolant Concentration Tester

The ATAGO PAL-91S Ethylene Glycol Refractometer is a compact digital refractometer designed for fast and accurate measurement of ethylene glycol concentration and coolant freezing point. It is ideal for automotive workshops, fleet maintenance, marine engineering, HVAC servicing, and industrial cooling system applications where maintaining the correct coolant mixture is essential.

With a measurement time of approximately 3 seconds, automatic temperature compensation, and an easy-to-read digital display, the PAL-91S simplifies coolant testing while delivering reliable and repeatable results. The built-in NFC data logging function stores up to 100 measurement records, allowing users to transfer data conveniently to compatible mobile devices or computers for documentation and quality control. Its IP65-rated water-resistant design also makes cleaning quick and convenient after each measurement.

Key Features

  • Measures ethylene glycol concentration and freezing point
  • Fast 3-second digital measurement
  • NFC data logging with 100-record memory
  • Automatic Temperature Compensation (ATC)
  • IP65 water-resistant design

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Looking for a reliable digital ethylene glycol refractometer for coolant testing? Contact us today to discuss your application requirements or request a quotation. Our team can recommend the right ATAGO refractometer for your maintenance or quality control needs.

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Description

Key Applications

  • Automotive radiator coolant testing
  • Fleet and heavy equipment maintenance
  • Marine engine cooling systems
  • HVAC and chiller servicing
  • Industrial cooling system maintenance

Why Choose This Model

  • Genuine ATAGO optical technology
  • Dual concentration and freezing point display
  • Built-in NFC data logging capability
  • Compact and lightweight handheld design
  • Fast and reliable digital measurements

Detailed Product Description

The ATAGO PAL-91S Digital Ethylene Glycol Refractometer is designed for professionals who require quick and accurate coolant concentration measurements in automotive, industrial, and commercial applications. By measuring both ethylene glycol concentration (% V/V) and the corresponding freezing point, users can easily verify whether coolant mixtures provide adequate protection against freezing while maintaining optimum cooling system performance.

Operation is simple and efficient. Place approximately 0.3 mL of coolant sample onto the prism, press the measurement button, and obtain a stable reading in approximately 3 seconds. Automatic Temperature Compensation (ATC) automatically compensates for sample temperature variations, ensuring dependable results without manual correction under normal operating conditions.

A key advantage of the PAL-91S is its integrated NFC data logging capability. The instrument can store up to 100 measurement records, which can be transferred to compatible Android devices, iPhones, or computers equipped with an NFC reader. This enables maintenance teams and quality control personnel to maintain digital inspection records, improve traceability, and simplify reporting.

Built with an IP65-rated water-resistant housing, the PAL-91S is easy to clean after use and is well suited for routine coolant inspection in automotive workshops, marine vessels, HVAC systems, manufacturing plants, power stations, and industrial facilities where accurate coolant monitoring is essential.

Why Check Coolant Concentration?

Maintaining the correct ethylene glycol concentration is essential for ensuring reliable performance and long-term protection of cooling systems. Coolant that is too diluted may not provide sufficient freeze protection or corrosion resistance, while an overly concentrated mixture can reduce heat transfer efficiency and increase operating temperatures.

Regular coolant testing helps identify changes in coolant condition caused by topping up with water, coolant degradation, or system leaks. By measuring both ethylene glycol concentration and the corresponding freezing point, maintenance personnel can quickly determine whether the coolant mixture remains within the recommended operating range.

Routine coolant testing is widely adopted in preventive maintenance programmes for passenger vehicles, commercial fleets, marine engines, industrial machinery, HVAC systems, generators, and manufacturing equipment. Using a digital refractometer such as the ATAGO PAL-91S enables fast, accurate, and repeatable measurements, helping reduce the risk of cooling system failures, unplanned downtime, and costly repairs.

Benefits of Routine Coolant Testing

  • Prevents coolant freeze damage
  • Reduces corrosion and system wear
  • Maintains efficient heat transfer
  • Supports preventive maintenance
  • Minimises unexpected equipment downtime

What’s Included

  • ATAGO PAL-91S Ethylene Glycol Refractometer × 1
  • Instruction Manual
  • ATAGO Calibration Report × 1
  • AAA Batteries × 2

Why Buy From Us

  • Genuine ATAGO Products
  • Singapore Supplier
  • Responsive Technical Support
  • Fast Delivery
  • 90-Day Warranty

Product Specifications

Product Specifications
Model PAL-91S
Cat No. 4491
Measurement Range Ethylene Glycol: 0.0 to 90.0% (V/V) Freezing Point: 0 to -50°C
Resolution Ethylene Glycol: 0.2% (V/V) Freezing Point: 1°C
Accuracy Ethylene Glycol: ±0.4% (around 15%) Freezing Point: ±1°C
Temperature Display 10.0 to 100.0°C
Automatic Temperature Compensation 10 to 100°C
Ambient Operating Temperature 10 to 40°C
Sample Volume Minimum 0.3 mL
Measurement Time Approx. 3 seconds
Memory 100 measurement records
Data Transfer NFC
Protection Rating IP65
Power Supply 2 × AAA Alkaline Batteries
Battery Life Approx. 11,000 measurements
Dimensions 55 × 31 × 109 mm
Weight 100 g

Frequently Asked Questions

1. What does the PAL-91S measure?

The PAL-91S measures ethylene glycol concentration (% V/V) and displays the corresponding coolant freezing point.

2. Can the PAL-91S test automotive radiator coolant?

Yes. It is suitable for testing ethylene glycol-based automotive coolants used in passenger vehicles, commercial vehicles, heavy equipment, and industrial cooling systems.

3. Does the PAL-91S measure propylene glycol?

No. The PAL-91S is specifically designed for ethylene glycol. For propylene glycol applications, ATAGO offers dedicated refractometer models.

4. How much sample is required?

Only approximately 0.3 mL of coolant sample is required for each measurement.

5. How long does each measurement take?

The PAL-91S delivers accurate measurement results in approximately 3 seconds.

6. Does the PAL-91S require manual temperature correction?

No. The instrument features Automatic Temperature Compensation (ATC) to provide reliable measurements within its specified operating range.

7. What is the NFC data logging function?

The PAL-91S can store up to 100 measurement records and transfer them to compatible Android devices, iPhones, or PCs equipped with an NFC reader, making inspection records easier to manage and document.

8. Is an ATAGO Calibration Report included?

Yes. Each PAL-91S is supplied with an official ATAGO Calibration Report issued by the manufacturer.

9. Is the PAL-91S waterproof?

The PAL-91S has an IP65 protection rating, allowing it to be rinsed under running water for easy cleaning after use. However, it should not be submerged in water.

10. Which industries commonly use the PAL-91S?

The PAL-91S is widely used in automotive servicing, fleet maintenance, marine engineering, HVAC maintenance, manufacturing, industrial cooling systems, and power generation.

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