Gas Detection Made Easy
The Guardian line of Hydrogen-Sulfide (H2S) Detectors are designed to service the natural gas and petroleum industries. Constructed to meet the industry's highest standard of water and dust resistance, Graphic Controls Guardian delivers reliable performance even in harsh conditions.
Our detectors were designed with the field operator in mind emphasizing:
- Ease of use
- Low Maintenance
- Reliability
- Durability
| H2S Guardian |
H2S Guardian Pro |
The H2S Guardian combines reliable protection, ease of use and low cost of ownership.
- The Guardian's compact size and light weight allow it to be comfortably carried on a belt, pocket or hard hat band.
- With a two year battery life, the Guardian is virtually maintenance free
- Recommended calibration interval of 180 days
- Low Cost Solution.
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The H2S Guardian Pro offers advanced features to meet all of your safety requirements.
- The Guardian's compact size and light weight allow it to be comfortably carried on a belt, pocket or hard hat band.
- Sensor and batteries can be replaced after two years, extending the life of your device.
- Recommended calibration interval of 180 days
- Data logging capabilities to track key events / measurements
- Advanced Bluetooth data transfer technology makes record keeping easy
- Economic alternative to complicated and expensive devices on the market.
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The H2S Guardian utilizes an advanced electrochemical sensor that responds quickly to the presence of hazardous gas. Advanced electronics with embedded software compute accurate concentrations in parts per million (ppm).
Our Peak Detection feature records the highest reading that the sensor has been exposed to since it was last cleared.
Two factory-set alarm conditions indicate TWA (10 ppm) and Ceiling (15 ppm) conditions with both audible tone, flashing LEDs and vibration. The alarm can be muted for diagnostic applications.
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| Range: |
0-400 ppm |
0-400 ppm |
| Resolution: |
1 ppm |
1 ppm |
| Accuracy: |
+/- 10%
(or +/- 2 ppm - whichever is higher) |
+/- 10%
(or +/- 2 ppm - whichever is higher) |
| Initial Response Time: |
< 5 seconds |
< 5 seconds |
| Response Time: |
< 20 seconds
(T90, time to reach 90% of full signal) |
< 20 seconds
(T90, time to reach 90% of full signal) |
| Size: |
3.2" x 2.2" x 0.86" |
3.2" x 2.2" x 0.86" |
| Battery Life: |
2 years - depending on alarm condition |
2 years - depending on alarm condition
Replaceable after 2 Years |
| Alarm: |
10 ppm low, 15 ppm high (audible, visual and vibration) |
10 ppm low, 15 ppm high (audible, visual and vibration) |
| Temperature Range: |
-4 to 122° F (-20 to +50° C) |
-4 to 122° F (-20 to +50° C) |
| Humidity: |
20% to 90% RH continuous (0-99% intermittent) |
20% to 90% RH continuous (0-99% intermittent) |
| Sensor Type: |
H2S specific electrochemical sensor |
H2S specific electrochemical sensor |
| Ingress Rating: |
IP 67 (dust proof, water proof) |
IP 67 (dust proof, water proof) |
| Data Logging: |
N/A |
Yes |
| Data Transfer: |
N/A |
Bluetooth |
Contact us to request more information.