Description
The Gestra NRS 1-50 is a highly reliable electronic level switch designed for the monitoring and control of water levels in steam boilers and pressurized vessels. As part of the advanced Gestra SPECTOR module series, it utilizes conductive level measurement technology to ensure precise detection of water levels, providing essential protection against low-water conditions and preventing boiler damage. The unit is engineered for seamless integration into industrial automation systems, featuring robust electronics that ensure long-term stability, minimal maintenance, and compliance with the most stringent international safety standards for thermal equipment.

Key Technical Specifications
- Operating Voltage: 24 VDC supply voltage.
- Measurement Principle: Conductive level measurement for high accuracy.
- Output Signal: Relay outputs for alarm and control functions (potential-free).
- Protection Class: IP65 enclosure rating for industrial protection.
- Communication: CAN bus interface for integration into modern control systems.
- Response Sensitivity: Adjustable sensitivity levels to suit various water conductivities.
- Housing Type: Compact design for installation in standardized control cabinets.
- Operating Pressure: Compatible with steam systems up to 32 bar.
- Operating Temperature: Suitable for ambient temperatures up to 70 °C.
- Safety Approval: SIL 3 certified for critical safety-related boiler control applications.
Recommended 10 Models in the Gestra SPECTOR Series
- NRS 1-51 – Level Switch for High-Pressure Steam Boilers
- NRS 1-52 – Level Switch with Additional Redundant Safety Features
- NRG 16-50 – Level Electrode for Conductive Measurement
- NRG 17-50 – High-Temperature Level Electrode
- NRG 19-50 – Level Electrode with Enhanced Pressure Rating
- URB 1 – Level Controller for Continuous Level Indication
- NRG 26-40 – Capacitive Level Electrode for Boiler Applications
- NRS 2-50 – Conductivity Switch for Boiler Water Analysis
- TRV 5-50 – Temperature Regulator Module for Boiler Efficiency
- SPECTORconnect – Software for System Configuration and Monitoring

