Product Description
Gestra NRS 1-7 b FR 230V Conductivity Level Controller
The Gestra NRS 1-7 b is a high-reliability conductivity level controller designed for industrial applications, particularly for monitoring water levels in steam boilers and tanks. This compact unit operates by measuring the electrical conductivity of the medium to detect minimum or maximum levels. It features integrated alarm indicators and Test I/II functions for simplified diagnostics and maintenance, along with a 2-minute inspection mode. Engineered for safety and performance, the NRS 1-7 b is cULus Listed and FM Approved, ensuring it meets stringent industry standards. It is designed to be used in conjunction with the Gestra NRG 1x-11 level electrode for a complete and dependable level control system.
Technical Specifications:
- Model: NRS 1-7 b FR 230V
- Input Voltage: 230 Vac
- Input Power / Frequency: 5 VA / 50-60 Hz
- Output Rating: 240/250 Vac, 2.5 A
- Conductivity Setting: 10 µS/cm (for c=0.3 cm⁻¹)
- Max. Ambient Temperature: 55 °C (131 °F)
- Required Accessory: Gestra NRG 1x-11 Level Electrode
- Approvals: cULus Listed, FM Approved, TÜV, CE

Gestra NRS 1-7 b FR 230V Conductivity Level Controller
Order the Gestra NRS 1-7 b FR 230V, a reliable industrial conductivity level controller for precise water level monitoring and alarm functions in steam boilers and vessels. FM and cULus approved.








