Teledyne IR-7000 - Non-dispersive infrared series - Manual (Page 11)

NDIR Gas Analyzer Introduction 1
Teledyne Analytical Instruments., - Rev. 3 3
IR7000D Dual Optical Bench for Monitoring 2 Gases
IR7000B Wall Mount Unit
The standard rack mount model IR7000 is shown in Figure 1-1 and
the portable IR7000P is shown in Figure 1-2. The explosion proof models
have the analysis unit installed in an explosion proof housing and employ
steel tubing and fittings in the sample system. The control unit on these
models is separate from the analyzer and generally located outside the
hazardous environment.