
1.PRODUCT DESCRIPTION
1.1 Introduction
Model 4105 Series Gas Sensor module features non- intrusive calibration,
This manual provides instructions for 4105 series gas sensor modules that utilize common packaging and transmitter electronics with different sensors for de- tection of various gases. The full model number of the gas sensor module includes a suffix,
1.2 Application
The Model
Optional fittings and adapters can be supplied by Si- erra Monitor to provide continuous sample delivery to the sensor module.
1.3 Configuration
The gas monitor is comprised of a
5.42" |
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| 4.50" |
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2.81" 1.75"
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| FAULT /KEYPAD | |
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| MODEL |
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| Combustibles % LEL |
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5.50" | Unity SPAN | ZERO | |
| Ph. | ||
| Milpitas, CA | 7.25" | |
| CAL |
Figure 1.2 Outline View - Gas Sensor Module
Instruction Manual
Figure 1.1 Model 4105 Gas Sensor Module
1.3.1 Electronics
When installed, the transmitter electronics will be con- nected to a power supply and control device via three wire cable.
The electronics provide a
-L.C.D. readout of ppm of gas concentration.
-Magnetic switches for
-Visual indicators for fault condition.
-Electrical fault (0 mA) to controller.
The transmitter electronics assembly includes a printed circuit assembly and a cover plate which con- tains the L.C.D. readout and magnetic switches for calibration.
1.3.2 Sensor
The gas sensor cell is enclosed in a threaded housing and is plugged into a signal card located in the enclo- sure. This configuration allows for easy field replace- ment of the sensor cell.
Combustible: The gas sensor is a catalytic bead type.
Toxics & Oxygen: The gas sensor is an Electro Chemi- cal type.
Model 4105 Gas Sensor Module (12/02) | Page: 1 |