Measure pH, ORP, EC or salinity with an Arduino or Raspberry Pi

μFire pH Probe Datasheet

Lab Grade:

  • Measuring Range: 0 - 14 pH
  • Working Temperature: 5 - 60 °C (41 - 150 °F)
  • Body Material: plastic
  • Refillable: no
  • Theoretical slope: 97% @ 25 °C
  • Zero Point: 7 ±0.25 pH at 25 °C
  • Impedance: 250MΩ @ 25 °C
  • Response Time: ~1 s
  • Alkaline Error: < 15 mV @ 25 °C
  • Connector: BNC
  • Cable length: 1 m
  • Dimensions:: 12x165 mm

Industrial & Combined pH/EC Probe:

  • Measuring Range: 0 - 14 pH
  • Working Temperature: 0 - 80 °C (32 - 176 °F)
  • Body Material: plastic
  • Refillable: no
  • Theoretical slope: 98% @ 25 °C
  • Zero Point: 7 ±0.5 pH at 25 °C
  • Impedance: 200MΩ @ 25 °C
  • Response Time: ~7 s
  • Alkaline Error: < 15 mV @ 25 °C
  • Connector: BNC
  • Cable length: varies

The useful life of the probe is between 6 months to 1 year, dependant on use. Care must be taken to prevent breaking the probe. The glass bulb must always be submerged in liquid. For long-term storage, it should be kept in an appropriate storage solution.

Cleaning

Rinse with distilled water between uses to maintain the cleanliness of the probe.

For more thorough cleaning and/or reconditioning: Soak in a 4% HF for 5 seconds or HCl for 1-2 minutes. Then rinse with distilled water and store the probe in storage solution.

If the probe has been fouled:

Contaminant Clean with
Metal oxides soak in 1M HCl
Grease soap
Hydrocarbons alcohol, acetone
Dyes diluted HCl