Environmental Chamber Or Glovebox Sensor Mounting; Temperature Probe Installation - Michell Instruments Optidew User Manual

Optidew User's Manual

2.5.3. Environmental Chamber or Glovebox sensor mounting

If the sensor is to be positioned into a sealed but open environment (glove box,
environmental chamber or area to be monitored) a female thread of M36 x 1.5-6H is required
to suitably thread onto the sensors male M36 x 1.5-6g thread. The bonded seal provided will
require a good surface finish (0.8 Ra) across a minimum sealing face of DIA 46.0mm to
ensure leak free operation up to the max operating pressure of the sensor (25barg). The
bonded seal will also require a strong hand tightening to ensure leak free sealing of the two
mating faces.
Always ensure you have tightened up with adequate torque to ensure leak free sealing.
Care should be taken when fitting the sensor to ensure the bonded seal remains centralised
whilst threading the two mating M36 x 1.5 parts together. Also ensure that the sensor is suitably
located in a position that will see a representative flow of the sample to be measured.

2.6. Temperature Probe Installation

The temperature probe is supplied pre-wired and simply requires fitting to the connector on
the Optidew control unit prior to use.
Take into consideration how you will use the readings from your temperature probe before
installing it. If the measurement will be used in combination with the dew point measurement
to calculate % RH, then the temperature probe should be installed in a location which is most
representative of the temperature of your environment or sample.
Be aware that when depressing the mirror temperature by more than 40°C, the Optidew dew-
point sensor will generate a small amount of heat in the surrounding area. Try to situate the
temperature probe upstream of the dew-point sensor and at least 150mm away.
Refer to section 4.4.5 for more information on calculated parameters and which measured
inputs are used to derive them.
14 97551 Issue 4.1, October 2019