Related Products
Various pH probes available.

pH-HR - pH/Temperature Data Logger:

Product Specifications:

Download Datasheet

Download Instruction Sheet on Taking good care of pH probes


pH-HR and M-11-Pt100 pH probe
pH-HR shown with M-11-Pt100 pH probe and pH-HR Plug Set

The pH-HR is a small three channel high resolution (12 bit) pH and Temperature data logger housed in a rugged 304 stainless steel case.

The logger connects to an external pH probe and also has the option of connecting to an external RTD Pt100 temperature probe to allow temperature compensation of the pH reading. Many pH probes have a built in RTD Pt100 temperature sensor for convenient connection.
The pH-HR logger also has an internal temperature sensor for convenient logging of ambient temperature if desired.

1 to 5 year battery life depending on usage as below, user replaceable. Data is retained in the event of battery failure. Battery Status Monitor in Omni7 Software.

  • Warning: When using the Average, Maximum or Minimum reading(s), the loggers reads the attached sensor(s) every second. This will reduce battery life.
  • Using the logger in temperatures below -5°C (23°F) will reduce battery life.

Ordering Information:

Order code: Description:
pH-HR pH / Temperature (Does not include pH probe)
M-## pH probe pH probe for pH-HR. Note: We recommend using a pH probe that has a built in RTD Pt100 temperature sensor for the best possible accuracy with the pH-HR.
pH-HR Plug Set Fit plug set to pH probe for use with pH-HR logger.
Download options:

Omni7 Software (used with all TruTrack data loggers):
Omni7 Software Installation CD and USB download cable Kit
Omni7 Software Installation CD and RS232 download cable Kit

Spare download cable:
HR Series USB download cable (2m)
HR Series RS232 download cable (2m)