The Gestra NRS 1-7B is a high-integrity level switch designed for safety-critical water level monitoring in steam boiler systems and industrial applications. It supports both high and low level detection and pump control.

Technical Specifications

• Model: NRS 1-7B
• Function: Water level limiter and controller
• Measurement Principle: Conductivity-based detection
• Supply Voltage: 230 V AC, 50/60 Hz (also available in 24 V, 115 V, and 240 V variants)
• Power Consumption: Approx. 3 VA
• Response Delay:
  • 3 seconds for industrial use
  • 15 seconds for marine applications
• Protection Class: IP 40
• Weight: Approx. 0.8 kg