is this termo couple...? plz give the detail.how it work.? how to use...?

The temperature sensors for the AVTECH range of temperature and environment monitors are thermistor sensors. You need to use them with the AVTECH TemPageR or Room Alert. The sensor detects the temperature data and is polled by the software in the AVTECH base unit. The user sets temperature thresholds and an alert is activated if the temperature date falls outside this threshold. An email and or SMS message can then be automatically sent to notify the user of the alert state.