This Manometer instructs the digester PLC of the pressure status of the
digester whilst screening pressure variations due to wind.
The 'Practically Green Manometer" provides a robust solution to the poblems associated with simple 'u' tube manometers which may give false signals during wind and storm, when someone uses a mobile phone or CB radio, or when insects or dirt fall into the tube limbs. It is built to be sensitive to extremely small pressure changes enabling control signals to be made at pressure drops that will not even break the meniscus on the probes on a traditional "0-6" WG 'U' Tube.
This unit operates through snow, wind, hurricane, fails safe if it dries out and protects your system and operators year after year after year. The active switches are plug in units for rapid replacement in the event of a failure. Routine annual replacement of switch units ensures system safety at little cost.
We have thousands of operating hours with the unit on real farms with low maintenance regimes.
This unit should be cleaned and refilled annually.
Operating Pressure Atmospheric + /- 50mm (2 inches) of water gauge to protect unpressurised gas bags.
Gas Pressure Set Point In Factory (adjustable) mmWG |
Interpretation |
PLC Action |
| +9 | High Alarm | Sound Alarm Red flashing light (high alarm position) Warning Message - "Check Presure Relief Valve" Boiler and CHP unit enabled and ON |
| +6 | High Control | Red Light (High Position) Warning Message - "Gas Pressure High -OK" Boiler and CHP unit enabled and ON |
| 0 to +3 | OK | Green Light in OK position Warning Message "Pressure OK" All ignition sources enabled |
| -3 to 0 | Low Pressure | Red light - low gas pressure position Warning Message "Low Gas Pressure - waiting" All ignition sources immediately disabled for 30 minutes |
| -3 to -6 | Emergency Low Pressure | Flashing Red Light in Emergency Low Pressure Warning Message "Danger, Air in Gas Lines - Purge before Reset" All ignition sources immediately disabled until manual reset with key operated switch |
Designed as the most sensitive biogas manometer on the market for low pressure applications, this unit has hundreds of thousands of operating hours to its credit.
Contents of Manometer KitNOTE THIS UNIT IS SOLD AS A COMPONENT FOR BUILDING INTO A DIGESTER SYSTEM BY A COMPETENT BIOGAS ENGINEER. THE CORRECT ASSEMBLY AND SAFETY ASPECTS OF THE SYSTEM ARE THE RESPONSIBILITY OF THE PURCHASER.
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