PH850-SA pH meter for strongly alkaline solutions


Plus 19% MwSt. DE
SKU: 28APE190074 / AI5527 Categories: , , , Tag:

The PH850-SA 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 basic/alkaline character (up to 14 pH). The LabSen® 841 pH electrode included in the scope of delivery is equipped with a special HA glass membrane, which ensures that the alkali error is minimized when measuring high pH values. The electrode can be used at temperatures up to 130°C (266°F) and is therefore also suitable for high-temperature solutions. An MP500 temperature sensor is included in the set for temperature measurement. The PH850-SA 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® 841 pH electrode for strongly alkaline solutions and high-temperature solutions
  • 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® 841 pH electrode from Apera Instruments is manufactured using proprietary Swiss sensor technology and materials. It was specially developed for the measurement of strongly basic solutions (10-14 pH).

LabSen HA Glass Membrane – The LabSen 841 pH electrode uses a special glass membrane that provides better accuracy and reproducibility in strong base solutions while minimizing alkali error. The hemispherical glass diaphragm is robust and built to be highly shock resistant (up to 10 times more robust than conventional products), significantly reducing the likelihood that the electrode will break upon impact.

Silver Ion Trap Reference System – In addition to the Long Life Reference System, a silver ion trap is incorporated into the LabSen 841 pH electrode to prevent blockage or contamination of the diaphragm by silver sulfide.

Measuring range (1 ~ 14) pH Electrolyte 3M KCl
Recommended operating temperature (0 ~ 130) °C Storage solution 3M KCl
Membrane type HA Membrane resistance <500MΩ
Shank material Lead free glass 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® 841 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 LabSen841 DE
English PH850 EN Apera LabSen841 EN