Review on Gain Express AZ Instruments 4-Channel K Type Thermometer with SD Card Data Logger, Thermocouple Temperature Measurement, and 2 Bead Type K-Thermocouple Probes by Nigel Cohen

I use this to monitor the efficiency of my boiler system. 4 channels is good. I tested in an ice bath and boiling water. Using the offset function, I was able to calibrate all channels to within a few tenths of a degree, according to the declared properties. I also compared it with my meter. The device creates a CSV file during registration. I was able to take the generated CVS file and import it into OpenOffice to show the temperatures inside and outside the boiler and each zone to calculate the thermal energy consumed by each zone. I used this to adjust the flow rate of the water to ensure the water had spent enough time in the line circulating each zone to properly heat my soil. Pros: Uses standard k-type thermocouples. The temperature of each channel is easy to read on the display. Uses standard 9V, 1.5A power supply. 5.5mm x 2.1mm center positive terminal. Manual, difficult to read, poor English translation. The sensors that come with the device are very short (glad the K-type sensors are cheap). All in all I can recommend this device.