According to Hanna Instruments , engineering tests often require two samples to be measured simultaneously.
For this reason, HI 93532 has two built-in K-type probe connectors. This advanced meter has a dual-level display that shows the current reading along with the high and low temperatures in either channel. You can also see the difference between the two channels simultaneously with the high and low of the difference. Any reading can be frozen on the display for easy recording with the HOLD button. HI 93532 reads with a resolution of 0.1°C in the range of -149.9 to 999.9°C, once only possible in sophisticated bench equipment used in research. For even greater accuracy, the HI 93532N offers all the features of the HI 93532 plus a CAL button allowing simple calibration of the meter and probe with an ice bath at 0°C. HI 93532N also features a backlight for low light conditions. In addition, the HI 93532R model allows users to send the displayed measurement to a PC or printer through RS232 serial port (once every 2 seconds). K-type thermocouple probes should be ordered separately to meet your specific application.
HI 93532 is supplied complete with batteries, protective case and instructions. HI 93532N is supplied complete with batteries, protective case and instructions. HI 93532R is supplied complete with batteries, protective case and instructions.