PH8500-HF pH meter for strong acid and hydrofluoric acid with GLP memory function and data output

PH8500-HF pH meter for strong acid and hydrofluoric acid with GLP memory function and data output

SKU: 28APE190083 / AI5525 Categories: , , , Tag:


The PH8500-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 PH8500-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. In addition, the meter has a memory function and GLP data management with storage 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® 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
  • 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® 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 -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® 831 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
  • manual
  • Carrying case


German PH8500 DE Apera LabSen831 DE
English PH8500 EN Apera LabSen831 EN