GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60

Level Electrodes

GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60 Level Electrodes
GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60 Level Electrodes
GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60 Level Electrodes

GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60 Level Electrodes

In combination with the URS 60 / URS 61 safety control unit, NRG 1x-60 level electrodes are suitable for safety functions up to SIL 3.

They are elements of a safety circuit up to a rating of SIL 3 as per EN 61508 in the SPECTORconnect system, and can transmit alarm notifications.

The level electrode uses the principle of conductive measure- ment and monitors itself. This means that a leaking or con- taminated electrode insulator and/or a fault in the electrical connection trigger an alarm.

Alarms and error messages are displayed by LEDs or an operating unit. They are also saved in the level electrode and transferred to the URS 60 / URS 61 safety control unit using the CANopen protocol.

The NRG 1x-60 can indicate the minimum fill level in electrically conductive fluid:

  • A fill level with a switchpoint.
  • An NRG 1x-60 level electrode can be installed in a protective tube or level pot together with an NRG 1x-61 level electrode or continuous GESTRA NRG 26-60 level
  • NRG 1x-60 level electrodes are used in conjunction with the URS 60 / URS 61 safety control unit as water level limiters for pressurised steam and hot-water

Water level limiters switch off the heating when the water drops below the set minimum level (LW).

Visualisation and operation take place via the URB 60 or SPECTORcontrol operating unit.

Conductive level measurement based on the conductivity measurement principle. Some liquid substances are conduc- tive, i.e. electric current can flow through them. To ensure this method functions reliably, the substance being measured must have a certain minimum conductivity.

The conductive measuring process delivers two findings:

  • Electrode rod immersed or electrode rod not immersed, or in other words switchpoint reached or not reached.

Before installation, the length of the electrode rod must be adapted to match the point at which switching must take place, e.g. for switching off the burner and interrupting the safety circuit.

Behaviour in the event of an alarm

  • When the water drops below the minimum level, the level electrode is no longer immersed and the URS 60 / URS 61 safety control unit triggers an
  • If an additional electrode is installed, the insulated section between the measuring electrode and earth is automatically monitored. If the value is below the admissible resistance value, the safety circuit is inter- rupted and burner switch-off is initiated.

Automatic self-test

An automatic self-test periodically monitors the safety and function of the level electrode and measured value acquisition

Model and mechanical connection

 

  • NRG 16-60, NRG 17-60, NRG 19-60,

thread G¾ A, EN ISO 228-1

  • NRG 111-60, thread G1 A, EN ISO 228-1

Nominal pressure rating, admissible service pres- sure and temperature

 

  • NRG 16-60 PN 40 32 bar (g) at 238 °C
  • NRG 17-60 PN 63 60 bar (g) at 275 °C
  • NRG 19-60 PN 160 100 bar (g) at 311 °C
  • NRG 111-60 PN 320 183 bar (g) at 357 °C

Materials

 

  • Terminal box 2581 G AlSi12, powder-coated
  • Sheath 4301 X5 CrNi 18-10
  • Electrode extension 4401 X5 CrNiMo 17-12-2
  • Electrode insulation

NRG 16-60, NRG 17-60, NRG 19-60 Gylon®

  • Electrode insulation NRG 111-60, special ceramic

¦ Screw-in body:

  • NRG 16-60, NRG 17-60, NRG 19-60

1.4571, X6CrNiMoTi17-12-2

  • NRG 111-60 4529, X1NiCrMoCuN25-20-7

pH value

 

  • NRG 111-60 Maximum admissible = 10

Electrode lengths supplied

 

  • 500 mm, 1000 mm, 1500 mm, 2000 mm, 2500 mm,

3000 mm

  • The electrode extension can be shortened

Conductivity range at 25 °C

 

  • 5 µS/cm to 10,000 µS/cm

Sensitivity

 

  • 1 µS/cm at an immersion depth of 5 mm, with meas- uring surface extension

Supply voltage

 

  • 24 V DC +/-20 %

Power consumption

 

  • 7 VA

Current input

 

  • 0.3 A

Internal fuse

 

  • T2A

Safety cutout at excessive ambient temperature

 

  • Shutoff takes place at an excessive ambient temperature of = 75 °C

Electrode voltage

 

  • 2 VSS at no load

GESTRA NRG 16-60 NRG 17-60 NRG 19-60 NRG 111-60

Level Electrodes

GESTRA: The Ultimate Solution for Industrial Steam & Fluid Control Systems

Buy Genuine GESTRA Level Electrodes for Reliable Boiler Water Level Measurement

If you are looking for high-accuracy boiler level electrodes, GESTRA NRG 16-60, NRG 17-60, NRG 19-60, and NRG 111-60 are industry-leading solutions trusted worldwide for steam boilers, pressure vessels, and industrial power plants.

Designed and manufactured in Germany, GESTRA Level Electrodes deliver exceptional reliability, long service life, and precise level measurement, even in extreme temperature and pressure conditions.

GESTRA is a global leader in boiler control and steam systems, and the NRG series level electrodes are engineered to meet the highest international safety and performance standards.

Key Advantages:

  • ✔ High-precision water level detection

  • ✔ Suitable for high-pressure and high-temperature boilers

  • ✔ Corrosion-resistant stainless steel construction

  • ✔ Compatible with GESTRA level controllers

  • ✔ Certified according to international boiler safety regulations

  • ✔ Maintenance-friendly design for long-term operation

The NRG 16-60 is designed for conductive water level measurement in industrial steam boilers. It ensures stable and accurate signals for boiler control systems.

Applications:

  • Steam boilers

  • Hot water systems

  • Industrial process plants

The GESTRA NRG 17-60 offers enhanced reliability for continuous and limit level monitoring. It is ideal for systems requiring high operational safety.

Key Features:

  • High resistance to pressure and temperature

  • Long electrode service life

  • Accurate signal transmission

The NRG 19-60 is widely used in critical boiler safety applications, ensuring precise level detection even under fluctuating operating conditions.

Benefits:

  • Superior signal stability

  • High durability in aggressive boiler environments

  • Optimized for industrial steam applications

The GESTRA NRG 111-60 is a premium solution for advanced boiler level control systems, offering maximum accuracy and system integration.

Typical Uses:

  • Power plants

  • Chemical and petrochemical industries

  • Large-scale industrial boilers

Feature Specification
Measuring Principle Conductivity-based level measurement
Material Stainless steel
Max Operating Pressure Suitable for high-pressure boilers
Temperature Range Designed for extreme operating conditions
Compatibility GESTRA level controllers

  • Steam and hot water boilers

  • Power generation plants

  • Oil & gas industries

  • Chemical processing plants

  • Food & beverage manufacturing

  • Pharmaceutical industries

Using original GESTRA NRG 16-60, NRG 17-60, NRG 19-60, and NRG 111-60 level electrodes ensures:

  • ✔ Accurate boiler level measurement

  • ✔ Compliance with safety regulations

  • ✔ Reduced downtime and maintenance costs

  • ✔ Long-term system reliability

Avoid imitation or non-original parts that may compromise boiler safety and performance.

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