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 ±.3°C thermistor but have a ± .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 causes 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°.
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