New: The proven variable area flowmeters for small volume flows RVO/U, RVM/U, RMU, DKM and DKG can now also be used with contacts according to Atex in potentially explosive areas.
This enables safe measurement and monitoring of flow limit values, even for small measuring ranges in potentially explosive areas. Due to their width of only 15 mm, the contacts can also be used on the smallest flow meters / flow monitors. The complete flow meter / flow monitor is suitable for use in zones 1, 2, 21 and 22 according to Atex. A comprehensive risk analysis was carried out for the mechanical part of the flow meter to verify its suitability for this area. The associated documentation is stored at Bureau Veritas Consumer Products Services Germany GmbH.
The user can choose between different connection options for the contacts. In addition to device plugs according to DIN 43650 Form C, M12x1 plugs or cable connections are also possible.
The technical solution of the new Ex devices enables a particularly favorable price-performance ratio: We can offer you the small devices of these series in the Ex and Non-Ex version almost at the same price.
| Type | Measuring range | Design | Application |
| RVO/U-2 | 0.2…0.5 l/min to 12…28 l/min | with sight glass | for liquids |
| RVO/U-4 | 0.005…0.06 l/min to 1…5 l/min | with sight glass | for liquids |
| RVM/U-2 | 0,02…0.2 l/min to 8…30 l/min | full metal design | for liquids |
| RVM/UA-2 | 0.02...0.2 l/min to 8...30 l/min | full metal design | for liquids |
| RVM/U-4 | 0.005…0.06 l/min to 1…5 l/min | full metal design | for liquids |
| RMU-A | 2.5...11.0 l/min to 5.0...15.5 l/min | full metal design | for liquids |
| RMU/B | 0.4...2.1 l/min to 8.5...18.5 l/min | full metal design | for liquids |
| RVO/U-L2 | 3…12 Nl/min to 120…480 Nl/min | with sight glass | for air |
| RVO/U-L4 | 0.2...1.3 l/min to 10...42 l/min | with sight glass | for air |
| RVM/U-L2 | 2.5…10 Nl/min to 140…525 Nl/min | full metal design | for air |
| RVM/U-L4 | 0.6...2.2 Nl/min to 20...80 Nl/min | full metal design | for air |
| DKM-2 | 0.5…1.6 l/min to 2…7 l/min | full metal design | for viscous media |
| DKM/A-2 | 0.5…1.6 l/min to 2…7 l/min | full metal design | for viscous media |
| DKG-2 | 0.5…1.7 l/min to 2.5…8.0 l/min | with sight glass | for viscous media |
Please note that in the explosion-proof area, all measuring devices must be connected to intrinsically safe circuits.