Hach Intellical PHC281 Refillable pH Electrodes

The Hach Intellical PHC281 is a digital combination pH electrode with a built-in temperature sensor. The PHC281 is a refillable pH probe made for difficult samples.


  • Designed for premium performance, even in difficult samples
  • Can be moved between meters without the need to re-calibrate
  • Stored time and date stamp for each measurement
Starting At $668.00
Stock Drop Ships From Manufacturer  

The Hach Intellical PHC281 is a digital combination pH electrode with built-in temperature sensor. The PHC281 is a pH refillable probe made for difficult samples. This laboratory pH electrode is shockproof with its Zeonor plastic body protecting down to the glass bulb sensing element. A 59-mL bottle of saturated KCl Electrode Filling Solution is included with the probe.

The electrode is available with a 3 or 1 m cable. The PHC281 refillable pH electrode has a high electrolyte flow rate and a large open junction ideal for difficult samples, such as Low Ionic Strength (LIS), Ultrapure, dirty samples and samples with high solids content. The PHC281 is not suitable for use with organic solvents. A 59-mL bottle of 2.44 M KCl Electrode Filling Solution is included with the probe.

Accuracy: ±0.02 pH
Application: Low Ionic Strength & Dirty Samples
Cable Length: 3 m (9.84 ft)
Electrode Type: Refillable Reference Element
Filling Solution: 2.44 M KCl solution (#2965026)
Junction: Open Junction
Kit?: No
Length: 175 mm (6.89 in.)
Method Type: Field: Refillable Reference Element
Parameter: pH
Probe Type: Standard
Product Kit: Model: PHC281
Accessories Included: None
Range: 0 - 14 pH
Reference Type: Ag/AgCl
Resolution: 0.001/0.01/0.1
Sample depth: 15 mm (0.59 in.)
Sensor material: Zeonor™
Sensor Type: pH Glass
Special Features: Double junction reference
Temperature Accuracy: ±0.3 °C (±0.54 °F)
Temperature Range: 0 - 50 °C (32 - 122 °F)
Temperature Resolution: 0.1 °C (0.18 °F)
Test requirements: Parameter Needed: pH
Minimum Sample Depth (mm): 15
Thermistor: ATC
Warranty: 12 months
Weight: 0.15 kg
  • IntelliCAL Laboratory PHC281 pH electrode with storage soaker bottle and 3m cable
  • 59-mL bottle reference electrolyte filling solution (2.44 M KCl solution)
  • Test certificate
  • Basic User Manual
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