(877) 241-0042 Toll Free
How Accurate is the ThermaViewer®
Temperature Monitor?
The accuracy of the ThermaViewer depends on the sensor being used, since there is negligible instrument error (less than .1%). The ThermaViewer can be used with three different types of sensors; digital, thermistor, and thermocouple.
1. Digital Sensor (Analog Devices TMP04) Used with TDVD-01
If the digital sensor is used to sample data, the typical accuracy depends on what temperature is being measured. The spec is ±1.0°C at 25°C (room temperature) and ±1.5°C from -20 °C and 70°C. The ThermaViewer uses the TMP04 chip from Analog Devices.
2. Thermistor/RH or thermistor only sensor
There are two different thermistor sensors available. We normally supply a ± 0.3 °C thermistor but have a ± 0.2°C thermistor available as an option. These sensors are used on the TDVD-02 and the TDVDR-02 models to collect temperature. The RH sensor used on the TDVDR-02 model is made by Honeywell and is ±2% from 0% RH to 99% RH at 25°C, non-condensing. Exposure to > 90% RH may cause a reversible shift of 3% RH.
3. K-Type Thermocouple
The accuracy of the measurement using a thermocouple, is dependent upon the accuracy achieved by the K type thermocouple. The cold junction compensation is typically 1.5°C.; The limits of error for a K-type thermocouple are typically 2.3 °C or 0.75% above 0°C and 2.3 °C or 2.0% Below 0°C, but will vary depending on the thermocouple. The K-type thermocouple has very good repeatability which means that measured temperatures are the same even if the instrument itself is off by 1°C.