THERMATEL
TG1
Switch
General Description:
Two-Wire Intrinsically Safe Flow / Level / Interface Detection
The Magnetrol TG1/TG2 switch is the industry’s only two-wire,
intrinsically-safe thermal dispersion switch. The switch consists of
a probe and preamplifier with remote DIN rail electronics. Barriers
in the DIN rail enclosure provide a two-wire, intrinsically-safe circuit
to the probe/preamplifier.
Product Operation:
The preamplifier converts the temperature difference to a pulse
signal which is super-imposed on the two wires providing power
to the sensor. The DIN rail electronics provide operation control
including set point adjustment, LED indication of flow/level, relay,
fail-safe adjustment, and time delay. A non-linear mA output signal
is available for diagnostics and repeatable flow/level indication.
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Features:
DIN rail mounted electronics with built-in barrier provide a
two-wire intrinsically-safe circuit to the probe/preamplifier
L L L L L
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Versatile switch for flow and level
Set point adjustment at remote electronics
Up to 1,650 feet (500 meters) cable length
LED indication provides monitoring of actual flow/level
mA output signal will provide repeatable indication plus
can be used for diagnostics
Uses all Thermatel probes including low flow body and
high-temperature sensor
Applications:
Flow:
Liquid or gas flow, pump protection, cooling air/water, relief
valves, flow/no flow
Level:
Hi/Low level, high viscosity media, high solids content,
aeration/foaming, hygienic applications, interface detection,
high-temperature applications
APPROVALS
S P E C I F I C AT I O N S
Supply Voltage
Relay
Signal
Fail-safe
LED Indication
4 Green:
Flow/Level is normal
1 Yellow:
Flow/Level is near
set point
1 Red:
Alarm condition (TG1 only)
Set-Point
Adjustable via
potentiometer
24 VDC
2-amp, SPDT relay
mA output, non-linear
Switch selectable
Operating Temperature
Sensor:
-100° to +850° F
(-70° to +450° C)
Flow Range Insertion Probes
Water:
0.01 – 5 fps
(0.003 to 1.5 m/s)
Air:
0.1 – 500 fps
(150 m/s)
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MAGNETROL [ MAGNETROL INTERNATIONAL, INC. ]
