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General Description:

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.

Features:

DIN rail mounted electronics with built-in barrier provide a

two-wire intrinsically-safe circuit to the probe/preamplifier

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:

valves, flow/no flow

aeration/foaming, hygienic applications, interface detection,

high-temperature applications

S P E C I F I C A T I O N S

A P P R O V A L S

Supply Voltage

24 VDC

Relay

2-amp, SPDT relay

Signal

mA output, non-linear

Fail-safe

Switch selectable

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

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)

Switch

Two-Wire Intrinsically Safe Flow / Level / Interface Detection