PH8500-SB pH meter for strongly alkaline solutions with GLP memory function and data output

PH8500-SB pH meter for strongly alkaline solutions with GLP memory function and data output

SKU: 28APE190084 / AI5523 Categories: , , , Tag:


The PH8500-SB 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 PH8500-SB is protected by a silicone cover and is waterproof and dustproof (IP57), making it particularly well suited for field use, even in harsh environments. Furthermore, the meter has a memory function and GLP data management with storage space for up to 500 memory groups. It can be connected to a PC or laptop via USB to either read out the memory groups or perform real-time storage.

  • 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
  • GLP data management (500 memory groups) with data output via USB, also with real-time storage function
  • 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 -2.00 to 16.00 pH
Resolution 0.1/0.01 pH
Accuracy ±0.01 pH ±1 digit
Temperature compensation 0 to 100 ° C (automatic or manual)
calibration 1 to 3 points, automatic
mV Measuring range ±2000 mV
Resolution 0.1/1 mV
Accuracy ±0.1% F.S ±1 digit
Temperature Measuring range 0 to 100 °C
Resolution 0,1 °C
Accuracy ±0,5 °C ±1 digit
Further Memory locations 500 records
Memory values Numbering, date, time,

Measured value, unit, temperature

Interface USB
Power supply 3 x AA batteries / DC 5V (USB port)
Housing protection class IP57
Electrode connections BNC (pH/ ORP), 8-pin (conductivity),

RCA (temperature)

Dimensions / Weight 88x170x33 mm / 313g

with case: 360x270x76 mm / 1,3 kg

scope of delivery

A complete set contains:

  • PH8500 pH meter
  • LabSen® 841 pH electrode
  • MP500 temperature probe
  • Calibration solution (pH 4.00; pH 7.00; pH 10.01) 50ml each
  • USB cable
  • USB stick with PC-Link software
  • Screwdriver
  • operation manual
  • Carrying case


German PH8500 DE Apera LabSen841 DE
English PH8500 EN Apera LabSen841 EN