The PH-870 model is manufactured by Tecpel, and is a hand-held temperature meter with a lightweight design. It has a dual display of pH (mV) and temperature with calibration for high accuracy. It has functions including the hold, max, min, max-min and avg.
The unit has auto temperature compensation of 0 to 80°C, and has manual temperature compensation of 0 to 100°C that is user selectable. It has a RS232 interface integrated with Windows software, and is applicable for ion selective with "mV" range.