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Combustible Gas Detection
H2S Gas Detection
Toxic Gas Detection
Flame Detection
General



What type of cabling / wiring should I use to install a H2S gas detector?

Controllers
A four conductor shielded cable/wire should be used for all H2S installations. Listed below are the cable/wire sizes and distances for each of our H2S models.

The following charts apply to the Model S4000 Ananlog:
Power 24 VDC
Distance AWG
Feet
Meters
 
2000
610
14
1550
410
16
1050
320
18
650
200
20

Analog Signal
Distance AWG
Feet
Meters
 
9000
2740
14
5200
1585
16
3800
1160
18
2400
730
20



The following chart applies to the Model 2180A, 2280A
and 2602A:
Distance
AWG
Feet
Meters
 
900
275
20
1350
410
18
2250
685
16
3375
1030
14
*Note: Maximum resistance of 20 OHMS per sensor lead (40 ohms loop).
 

The following applies to the Model TA202A:
Power 24 VDC
Distance AWG
Feet
Meters
 
750
228
22
1100
335
20
1600
488
18
2250
685
16
4500 1372 14

Analog Signal
Distance AWG
Feet
Meters
 
1600
488
22
2400
731
20
3800
1158
18
5200
1585
16
9000 2740 14



How often should I calibrate my H2S gas sensors?
We recommend that all H2S gas detectors be calibrated at least once every 90 days to ensure integrity. We are not implying that the sensor will drift or have problems within this period but frequent calibration checks merely ensure the integrity and operation of the life protecting equipment.

This should be used as a guideline only and in some applications more frequent calibrations may be required. Each application must be carefully evaluated to determine the frequency of calibration.

What is the recommended installation procedure for an H2S sensor?
The sensor should be located 12 to 36 inches from the floor wherever H2S gas may be present.

Why do we recommend mounting the sensor low?
H2S gas is heaver than air, thus it will settle.

How do you calibrate an S4000T H2S detector?
You can use ampoules and a breaker bottle or a calibration kit consisting of a bottle of H2S gas, a .2 Liter / min regulator, 4 feet of tubing and a calibration cup

Why would I use a calibration kit over ampoules?
The calibration kit allows for flowing H2S gas. This eliminates calibration errors from high humidity or from contaminants which absorb H2S. Flowing H2S is less likely to be absorbed by the moisture/contaminants.

When is a splashguard recommended?
All the time for outside installations and even inside installations where wash downs take place.

 


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