The Gestra NRS 1-50 is a compact level switch designed for limit level detection in steam boilers and tanks using conductive electrodes. It provides reliable MIN/MAX water level signaling and integrates easily into safety and control systems.

Technical Specifications

• Model: NRS 1-50
• Function: Limit level switch for conductive liquids
• Electrode Compatibility: Works with Gestra electrodes such as NRG 1x-50, NRG 1x-51, NRG 1x-11, NRG 1x-12
• Supply Voltage Options:
  • 24 V DC
  • 24 V AC, 50/60 Hz
  • 115 V AC, 50/60 Hz
  • 230 V AC, 50/60 Hz
• Power Consumption: Approx. 3 VA / 1.5 W
• Sensitivity: 10 µS/cm at 25°C (standard for boiler applications)
• Output: 1 potential-free change-over contact
• Contact Rating (AC): Max. 250 V, 4 A, 1000 VA
• Contact Rating (DC): Max. 24 V, 4 A, 100 W