Product Description
GESTRA NRS 1-50 / NRS 1-51 Level Switch
The GESTRA NRS 1-50 and NRS 1-51 are compact, electronic level switches designed for reliable monitoring of conductive liquid levels, particularly in steam boiler applications. The NRS 1-50 functions as a level switch, often used for water level limiting, while the NRS 1-51 serves as a high or low-level alarm. Operating with a single electrode, these devices ensure safe and efficient plant operation by preventing low-water conditions or overfilling. Housed in a durable, DIN rail mountable enclosure, they feature adjustable sensitivity settings and a fixed time delay to prevent false switching from turbulence. Their wide-range supply voltage makes them versatile for various industrial control systems.
Technical Specifications:
- Model: NRS 1-50 / NRS 1-51
- Type: Electronic Level Switch / Alarm for Conductive Liquids
- Supply Voltage: 100-240V AC, 50/60 Hz
- Electrode Connection: For one (1) level electrode
- Sensitivity (Conductivity): Adjustable, models available for >0.5 µS/cm and >10 µS/cm
- Time Delay: 3 seconds (NRS 1-50)
- Mounting: DIN rail mounting

GESTRA NRS 1-50 / NRS 1-51 Level Switch
Discover the GESTRA NRS 1-50 / NRS 1-51, a reliable electronic level switch for single-electrode level control and alarm in steam boilers and conductive liquid systems. Features 100-240V AC operation and DIN rail mounting.







