SX811-SS portable food pH meter

SX811-SS portable food pH meter

SKU: 28APE190085 / AI452 Categories: , , ,


The Apera Instruments SX811-SS pH meter is the perfect combination of digital processing technology, software design and electrochemical measurement technology, specifically designed for pH measurement of food (e.g. meat, cheese, fruit, etc.) and semi-solid/soft materials (e.g. soil).

  • Equipped with the SWISS LabSen stainless steel spear electrode, for pH measurement of food (e.g. meat, cheese, fruit, etc.) and semi-solid/soft materials (e.g. soil)
  • Features automatic temperature compensation (ATC) in the range of 0°C to 100°C.
  • Calibration is performed with automatic recognition of buffer solutions. The meter offers a wide range of useful functions.
  • Intelligent self-diagnosis warns of out-of-range measurements, incorrect calibration and defective electrode. In addition, the device can communicate calibration reminders and check the date of calibration.

The Apera Instruments SX811-SS pH meter has a 2-year manufacturer’s warranty (6 months on the electrode).

Technical Specifications

Technical specifications

pH measuring range -2,00 to 19,99
pH resolution 0,1/0,01
pH accuracy ±0.01 ± 1 digit
calibration Automatic 1 to 3 point calibration
Electrode connection BNC
mV measuring range ±1999 mV
mV resolution -200mV to 200mV: 0.1mV; otherwise 1mV
mV accuracy 0.1 % F.S. ± 1 digit
Temperature measuring range 0 to 100 °C
Temperature resolution 0,1 °C
Temperature accuracy ±0.5 °C ± 1 digit
Memory locations 500 groups
Memory values Numbering, date, time, measured value, unit, temperature
Data output USB
Power supply 3 x AA batteries / DC5V (via USB)
Housing protection class IP57
Dimensions 88×179×33 mm (360 x 270 x 76 mm with case)
Weight 313g ( 1,6 Kg with case)

scope of delivery

Scope of delivery:

A complete set contains:

  • SX811-SS measuring device
  • Spear electrode LabSen 753
  • Calibration solutions (pH 10.01/ pH7.00 / pH4.00) per 50 ml
  • Storage solution 50ml
  • Carrying case



English Manual (SX811_EN_2018.pdf, 1,876 Kb)[Download].

German (SX811-SS_EN_2018.pdf, 1,911 Kb)[Download].



We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge any defective or damaged product attributable to the responsibility of APERA INSTRUMENTS, 2 years for the instrument and 6 months for the electrode from the date of delivery.
This limited warranty does NOT cover any problems due to:

  • Accidental damage
  • Incorrect use
  • Normal wear
  • Transportation
  • Storage
  • Non-compliance with the product instructions
  • Unauthorized maintenance, modification, combination or use with products, materials,
  • processes, systems or other matters
  • Unauthorized repair
  • External causes such as accidents, misuse, or other acts or events beyond our reasonable control.