PCE-DRU 1 Handheld Digital Refractometer

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PCE-DRU 1 Handheld Digital Refractometer

The PCE-DRU 1 is a handheld digital refractometer specifically designed for measuring the urea concentration in AdBlue, a diesel exhaust fluid used in vehicles to reduce nitrogen oxide emissions. This device is notable for its digital functionality, providing fast and precise measurements with a user-friendly three-button operation. It features an IP65-rated ABS plastic housing, making it resistant to water and dust, and it includes automatic temperature compensation (ATC) to ensure accurate readings across different environments.

This refractometer can measure AdBlue content ranging from 0 to 51%, refractive index from 1.3330 to 1.4056 nD, and temperature from 0 to 40°C (32 to 104°F). Its measurement speed is approximately 1 second, requiring only 4 to 5 drops of liquid for a sample. The device’s large digital LCD displays both the measured value and the temperature for ease of reading. It’s equipped with an internal light source to enhance measurement accuracy, especially in conditions with artificial lighting that could potentially cause errors in analog refractometers.

PCE-DRU 1 Key Features

  • fast and precise results
  • large LCD (reading and temperature)
  • waterproof ABS housing IP 65
  • automatic temperature compensation
  • small amount of sample
  • simple calibration with distilled water
  • stainless steel sample tray with glass prism
  • easy operation with three buttons
  • battery control system
  • automatic shutdown after 1 min. of no-operation

PCE-DRU 1 Specifications

Measuring range

  • 0 … 51 % urea (NH2) 2C0 (AdBlue) content
  • 1.3330 … 1.4056 nD (refractive index)
  • 0 … +40 °C / +32 … +104 °F temperature


  • 0.1 % / 0.0001 nD / 0.1 °


  • ±0.2 % / ±0.0003 nD / ±0.5 °C

General specifications

  • Automatic temperature compensation (ATC) range: +10 … +40 °C / +50 … +104 °F
  • Measurement speed: Approx. 1 sec.
  • Sample size: 4 to 5 drops of liquid
  • Sample well: Stainless steel ring over glass prism
  • Housing: ABS plastic, IP65 ingress protection rating against water and dust
  • Power supply: 1 x 1.5V AAA battery
  • Dimensions: Approx. 121 x 58 x 25 mm / 4.76 x 2.28 x 0.98″
  • Weight: Approx. 90 g / 0.2 lb (without battery)
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PCE Instruments is a reliable brand that provides a wide range of high-quality measuring tools for industries such as laboratory testing, industrial manufacturing, and environmental monitoring. With a team of highly skilled engineers and scientists, PCE Instruments develops innovative products in-house to ensure quality and precision. The brand has a world-class reputation for reliability, durability, and accuracy.

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