User's Manual

2 • RF Sensor System I&O Manual 026-1702 Rev 0 10-30-00
1.1. Hardware Components
1.1.1. Sensors
1.1.1.1. RF Ambient Temperature Sen-
sors
The RF Ambient Temperature Sensor is an
enclosure with a built-in broadcast antenna. This
sensor may be mounted anywhere within a
refrigerated case, as long as it is within 150 feet
of an RF Receiver and within a clear line of sight
to the receiver’s antenna.
Four models of the RF Ambient Temperature
Sensor are available. Each model has either
internal or external temperature sensing ele-
ments, and either clean switch or defrost termi-
nation digital inputs. Table 1-1 lists all RF
Ambient Temperature Sensor models along with
their characteristics.
Figure 1-2 - Ambient Temperature Sensor (Internal Model
Shown)
Part Number Description
809-3542 RF Internal Ambient Sensor, w/
sensor element mounted inside
enclosure, and with a built-in clean
switch button for alarm suspension
during cleaning
809-3544 RF External Ambient Sensor, w/
external NSF-approved stainless
steel bullet sensor and neoprene
leads, with external leads for con-
nection to clean switch
809-3552 RF Internal Ambient Sensor, w/
sensor element mounted inside
enclosure and external leads for
connection to digital defrost termi-
nation sensor
809-3550 RF External Ambient Sensor, w/
external NSF-approved stainless
steel bullet sensor and neoprene
leads, with external leads for con-
nection to digital defrost termina-
tion sensor
Table 1-1 - RF Ambient Sensor Models