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Install SNS Sensor Devices and Accessories
Once sensor devices are configured, they are ready for installation in their permanent locations.
Although not required, installing a thermobuffer with external probe sensor devices helps ensure
that sensor readings more closely approximate the temperature of the assets you are monitoring.
Install SNS Temperature and Humidity Sensors
Specifics of the installation depend on the monitored unit.
Installing Sensor Devices
1. For sensor devices with probes, in the monitored unit, locate an existing access hole, drill a
new access hole for insertion of the probe, or route the cable through the rubber door
gasket.
2. Route the external probe through the access hole.
3. (Optional) Install a thermobuffer. See Install a Thermobuffer on page 47.
4. Mount sensor and dress cable. All SNS AC-powered temperature and humidity sensor
devices come with self-adhesive hook-and-loop mounting tape. Alternatively, the sensor
device's base plate has four holes that may be used to mount it with screws.
Note:
5. Ensure that sensor device is powered on.
6. Activate sensor using the Service button.
7. Log into the AMP and verify that sensor device has checked in and is reporting within
expected ranges.
Install a Thermobuffer
In many environments, normal daily use of refrigerators or freezers results in routinely opened
doors, occasionally for prolonged periods when restocking. This may cause air temperature to
change drastically and then recover just as quickly when the door closes. Temperature sensors
respond to this quick change and can give readings inconsistent with the actual temperature of
stored goods.
The Primex Wireless SNSGRP SNS Thermobuffer, shown in Figure 24, is used with SNS
temperature sensors to simulate the actual temperature of contents within coolers or freezers and
limit impact of fluctuating air temperature. This helps provide a higher degree of measurement
accuracy and reduces risk of potential material spoilage. When a thermobuffer is in use, fluctuations
are minimized so you can rely on the AMP threshold exceeded alerts and do not need to define
span exceeded alerts.
The thermobuffer features a plastic bottle that can be filled with food grade glycol to delay the
temperature spikes found during the replacement of materials or while servicing refrigerators,
freezers or walk-in coolers. Whether protecting vaccines, food, medications or other temperature
sensitive materials, the thermobuffer can help provide a more consistent measurement of your
investments.
Primex Wireless, Inc.
The operating range of the AC-powered temperature sensor device is 32° -
95°F (0° - 35°C). If you're monitoring temperatures in a freezer, the sensor
device must be mounted outside the freezer.
SNS™ Temperature and Humidity Sensors Installation Guide
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