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D e t e c t i o n

WatchGas QGM Calibration Manual

This document describes the preferred calibration procedure of the WatchGas UNI product range. If you require 

any assistance, feel free to contact us at [email protected]

Equipment

To calibrate the WatchGas QGM the follow equipment is needed: 

•  WatchGas QGM

•  WatchGas QGM Calibration adapter

•  0.5 L/min regulator

•  Last-O-More hose

•  WatchGas IR link (optional)

•  Calibration gas

 

The use of the WatchGas IR link and IR link software is not required, but it’s certainly recommended. Span 

values can only be changed using the IR link software.

The WatchGas QGM can only measure O

2

, LEL, CO and H

2

S. Please refer to our well-priced list of calibration 

gases. Note that these gases are available in a multi-gas mixture. Calibrating using a multi-gas mixture is 

most cost and time efficient. 

Adequate safety measures should be taken when working with these type of gases. Avoid personal 

exposure at all times by working under a fume hood and/or wearing personal protective equipment.

List with commonly used calibration gases

Description

Size

Article Number

18%O

 /  2.2%CH

 /  50CO  /  10H

2

S in N

2

116L

CAL-C017064

18%O

2

 / 2.2%CH

4

 / 50CO / 10H

2

S in N

2

34L

CAL-C009147

18%O

2

 / 2.5%CH

4

 / 2%CO

2

 / 50CO / 15H

2

S in N

2

58L

CAL-C015013

100ppm I-C

4

H

8

 in Air

34L

CAL-C008920

100ppm I-C

4

H

8

 in Air

116L

CAL-C006392

18%O

2

 / 2.2%CH

4

 / 50CO / 10H

2

S in N

2

58L

CAL-C011916

18%O

2

 / 2.2%CH

4

 / 0.5%CO

2

 / 100CO / 25H

2

S in N

2

58L

CAL-C012017

18%O

2

 / 2.5%CH

4

 / 100CO / 25H

2

S in N

2

34L

CAL-A1069841

100% N

2

 (UHP)

116L

CAL-A0961956

18%O

2

 / 2.2%CH

4

 / 0.5%CO

2

 / 100CO / 25H

2

S in N

2

34L

CAL-C009266

100ppm I-C

4

H

8

 in Air

58L

CAL-C015004

50ppm NH

3

 in N

2

58L

CAL-C011793

20.9% / 1.1%CH

4

  /  200ppm CO in N

2

116L

CAL-C019604

15%O

/ 1.45%CH

4

/2.5%CO

2

 / 60CO / 20H

2

S in N

2

58L

CAL-C012032

18%O

2

 / 2.2%CH

4

 / 100CO / 25H

2

S in N

2

58L

CAL-C011921

15%O

2

 / 1.45%CH

4

 / 60CO / 20H

2

S in N

2

34L

CAL-C009154

18%O

2

 / 2.2%CH

4

 / 100CO / 25H

2

S in N

2

34L

CAL-A0915728

18%O

2

 / 2.2CH

4

 / 50CO in N

2

116L

CAL-A0975762

10ppm H

2

S in N

2

116L

CAL-C017065

25ppm H

2

S in N

2

58L

CAL-C011126

Tech/App Note 6 part 2

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