PH850-HF pH meter for strong acid and hydrofluoric acid


Plus 19% MwSt. DE
SKU: 28APE190073 / AI5529 Categories: , , , Tag:

The PH850-HF from Apera Instruments is a handy and easy-to-use meter for the determination of pH, ORP (electrode sold separately e.g. 301Pt-C) and temperature. It is ideal for making precise and reliable measurements of solutions with a strongly acidic character and hydrofluoric acid. The LabSen® 831 pH electrode included in the scope of delivery is equipped with a special HF glass membrane, which is extremely resistant to HF corrosion and thus significantly extends the service life of the electrode. An MP500 temperature sensor is included in the set for temperature measurement. The PH850-HF is protected by a silicone cover and is waterproof and dustproof (IP57), making it particularly well suited for field use, even in harsh environments.

  • Equipped with the LabSen® 831 pH electrode for precise and reliable measurements of strong acids and hydrofluoric acid
  • Long service life: HF-containing solutions can be measured approx. 1000 times. (Measurement condition: 25℃, 1% HF concentration, measurement time 1 minute).
  • Silicone case provides safe & firm grip and protects from shocks
  • Waterproof and dustproof (IP57) for use in harsh environments
  • Fold-out stand for convenient indoor operation
  • Quick and easy 1- to 3-point calibration
  • Large, illuminated LCD simultaneously displays conductivity value and temperature, as well as additional measurement and calibration information
  • Self-diagnosis supports calibration or troubleshooting

The meter is RoHS and EC certified and has a 3 year warranty (6 months on the electrode).


The LabSen® 831 pH electrode from Apera Instruments is manufactured using proprietary Swiss sensor technology and materials. It is specially designed for measuring solutions containing hydrofluoric acid (≥3pH) or other strongly acidic solutions.

LabSen HF Glass Diaphragm – The special hemispherical glass diaphragm allows precise, fast and reproducible measurements of highly acidic solutions and is resistant to hydrogen fluoride corrosion (1g/L). It is up to 10 times more robust than conventional products, minimizing the likelihood of the electrode breaking during impact.

Silver Ion Trap Reference System – In addition to the Long Life Reference System, a silver ion trap is incorporated into the LabSen 831 pH electrode to prevent blockage or contamination of the diaphragm by silver sulfide.

Measuring range (0 ~ 12) pH Electrolyte 3M KCl
Recommended operating temperature (0 ~ 100) °C Storage solution 3M KCl
Shank material Lead free glass Membrane resistance <400MΩ
Diaphragm type HF Electrode dimension (Ø12×120) mm
Reference system Silver ion trap Connection BNC
Diaphragm Ceramics Cable Ø3mm×1m

Technical Specifications

pH Measuring range 0.00 to 14.00 pH
Resolution 0,1/0,01
Accuracy ±0,01 ±1 digit
calibration 1 to 3 points, automatic
Temperature compensation 0 to 100 ° C (automatic or manual)
mV Measuring range ±1000 mV
Resolution 1 mV
Accuracy ±0.2 % F.S. ± 1 digit
Temperature Measuring range 0 to 100 °C
Resolution 0,1 °C
Accuracy ±0,5 °C ±1 digit
more Power supply 3 x AA batteries
Housing protection class IP57
Electrode connection BNC (for pH and ORP), RCA (for temperature)
Dimensions / Weight 88×170×33 mm / 313 g

with case: 360×270×76 mm / 1.3 kg

scope of delivery

A complete set contains:

  • PH850 pH meter
  • LabSen® 831 pH electrode
  • MP500 temperature probe
  • Calibration solution (pH 4.00; pH 7.00; pH 10.01) 50ml each
  • Screwdriver
  • manual
  • Carrying case


German PH850 DE Apera LabSen831 DE
English PH850 EN Apera LabSen831 EN