YSI 1003 pH/ORP (ISE) Sensor

YSI 1003 pH/ORP (ISE) Sensor


YSI 1003 offers simple, accurate pH and ORP measurement and is designed for minimal maintenance.


  • Sealed gel reference eliminates refilling, saves time
  • YSI 1003 carefully designed to perform under all ionic strength conditions
  • Not compatible with Quatro cables
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The YSI 1003 combination pH/ORP sensor features a 'long-life' sealed gel reference, eliminating the need to refill. The ORP sensor features a platinum electrode for optimum performance.

YSI 1003 pH sensors have been carefully designed to perform under all ionic strength conditions, from seawater with a conductivity of 53,000 uS/cm, to "average" freshwater lakes and rivers with conductivities of 200 to 1500 uS/cm, to pure mountain streams with conductivities as low as 15 uS/cm, which has historically been the most difficult medium with respect to accuracy, quick response to pH changes, and minimal flow dependence.
Notable Specifications:
  • 1-year warranty
Image Part # Product Description Price Stock Order
YSI 1003 pH/ORP (ISE) Sensor 605103 1003 pH/ORP (ISE) sensor, Pro Series
Usually ships in 3-5 days
Image Part # Product Description Price Stock Order
YSI Zobell Solution 061320 Zobell solution for ORP calibration, 125mL
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YSI pH Calibration Buffers 603824 3824 pH calibration buffer pack, 2 pints ea. of pH 4, 7, & 10
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