Teledyne 2000XTC - Thermal conductivity analyzer - Manual (Page 13)

Thermal Conductivity Transmitter Introduction
Figure 1-1 shows the 2000 XTC Thermal Conductivity Transmitter.
The instrument is comprised of two modules: the transmitter unit and the
galvanic isolator unit. The transmitter is located at the sample point
(which can be a hazardous area) and is where the sample gas input is
converted into an electrical output signal.
The galvanic isolator module contains the 24V power supply, the
power isolation safety barrier and signal output connection. This module
is used to provide safe power to the transmitter eliminating the danger of
ignition by sparks or heating due to excessive power.
Figure 1-1: XTC-Transmitter Modules
Teledyne Analytical Instruments 3