Manual

1 Overview 1-1. Product components

GD-70 - 6 -

Overview

1-1. Product components

• Operating manual

• Protective rubber cap (to be removed when using the

detector)

• Dedicated handling lever (for wiring)

• Dust filter

• Interference gas removal filter (to be supplied with some

sensor units)

* This is needed in "pyrolyzer + electrochemical type (ESU)"

and "pyrolyzer + pyrolysis-particle type (SSU)".

For more information on the pyrolyzer unit (PLU-70), see the

individual operating manual.

1-2. Purpose of use

• This is a fixed type gas detector head which detects leak of gases used in semiconductor factories, etc.

• The gas detector is a safety device, not an analyzer or densitometer which performs quantitative/qualitative

analysis/measurement for gases. You must understand the features of the detector before using it, so that

you can use it properly.

• The detector detects abnormalities in the air caused by presence of gases or other reasons (leak and

oxygen deficiency) with the built-in gas sensor unit. The concentrations of detected gases are shown on the

Character LCD.

• The built-in pump in the detector sucks gas to perform gas detection.

• The detector has two-step gas alarm contact and fault alarm contact.

• The detector outputs gas concentration in 4 - 20 mA or digital data.

GD-70D Analog Transmission (4-20 mA specification)

GD-70D-NT 2-wire type DC power-line communication (NT specification)

Pyrolyzer unit