Sodium Thiosulfate Refractometer ATAGO PAL-69S

The ATAGO PAL-69S is a digital handheld refractometer that measures sodium thiosulfate solution concentration in the range of 0.0-20.0% within 3 seconds. Designed for users in photography bath solutions, textile bleaching processes, and chemical analysis laboratories requiring rapid concentration control.

The instrument delivers results at ±0.2% accuracy and 0.1 Brix resolution using only 2-3 drops of sample. This provides a fast alternative to time-consuming titration methods. With an IP65 waterproof rating, it operates safely in humid laboratory or production environments. Compact dimensions of 5.5×3.1×10.9cm and 100g weight make it pocket-portable; powered by 2×AAA batteries for field applications.

The device measures temperature in the range of 10.0-40.0°C (±1°C), however, it does not feature automatic temperature compensation; therefore, measurement temperature should be kept under control. Its simple single-button operation delivers rapid and reproducible results.

Technical Specifications

Applications

• Sodium thiosulfate concentration control in photography bath solutions
• Solution monitoring in textile bleaching processes
• Rapid concentration measurement in chemical analysis laboratories