 |
 The assembly is welded to the vessel. |
Monitoring clear or contaminated liquids in opaque tanks or underground reservoirs
With electrical contacts: control of pumps, valves, high- or low-level alarms, etc.
float attached to a rod drives the movement of an indicator inside a borosilicate glass tube mounted above the tank. Level monitoring is performed
locally by visual observation of the indicator position at the end of the measuring rod.
The NA indicator is designed for installation on top of tanks. The float is guided by a submerged tube with a diameter of 63 mm. The assembly is secured by a DN 65 mounting flange.
Each instrument is manufactured according to the liquid density and the measurement range required. Note: The liquid level corresponds to approximately 70–80% of the float height.
Optional Electrical Contact
The indicator incorporates a magnet capable of actuating external contacts mounted outside the tube, such as MSK switches.
(See datasheet 727-90)
| NA | Top-mounted tank installation | |
| NA-... MSKW... | With bistable changeover contact | |
| NA-... Ex | ATEX explosion-proof version |
| Nominal pressure | PN 10 at 20 °C | |
| Operating pressure | Max. 8 bar | |
| Service temperature | Max. 80 °C (100 °C optional) | |
| Ambient temperature | Max. 90 °C | |
| Connection | Welded to the vessel | |
| Corrosion protection | Oven-cured epoxy ester coating, traffic blue (RAL 5017), semi-gloss finish | |
| Corrosion category | C2 | |
| Materials | ||
| Seals | Standard: NBR, EPDM (Optional: FKM, FFKM) | |
| Protective tube | P235 (1.4301 with MSKW contact) | |
| Head | S355 | |
| Union fittings | Galvanized malleable cast iron | |
| Sight glass | Borosilicate glass | |
| Float | 1.4571 stainless steel | |
| Float rod | 1.4571 stainless steel | |
| Flange and float guide tube | S355 |
