GESTRA NRGT 26-2

Model and mechanical connection

• NRGT 26-2 Thread G¾ A, EN ISO 228-1, see 7
• NRGT 26-2s Flange DN 50, PN 40, EN 1092-1, see 8

Nominal pressure rating, admissible service pressure and temperature

• NRGT 26-2, NRGT 26-2s PN 40          32 bar (abs) at 238 °C

Materials

• Terminal box 2581 G AlSi12, powder-coated
• Cover tube 4301 X5 CrNi 18-10
• Electrode rod insulation PTFE
• Screw-in body 4571, X6CrNiMoTi17-12-2

NRGT 26-2s:

• Flange 0460 P250GH
• Spacer disc PTFE

Max. installed length at 238 °C, all measurements in mm

• NRGT 26-2

• NRGT 26-2s

Measurement quality

The information below applies to a compensated fluid conductivity range from 0.5 – 10000 µS/cm based on 25 °C.

• Reading error: ± 1% of set measuring range at the operating point
• Resolution of reading on display: 1%
• Resolution for internal processing: 15 bit
• Resolution of 4-20 mA output: 15 bit
• Sensitivity (minimum conductivity)
  • Water = 5 µS/cm (see page 8 “Influence of the fluid to be monitored”)

Supply voltage

• 24 V DC ± 20%

Power consumption

• 7 W

Current input

• 0.3 A

Internal fuse

• T2A

Safety cutout at excessive temperature

• Cutout occurs when an excessive temperature of 75 °C is measured in the electrode tip

Analogue output

• 1 x actual value output 4-20 mA, proportional to level, galvanically isolated
• Maximum output load 500 O
• M12 connector, 5-pole, A-coded

Indicators and controls

• 1 x green 4-digit, 7-segment display for showing status information
• 1 x red LED for indicating an error state
• 1 x green LED for indicating an OK state
• 1 x rotary knob IP65 with button for menu navigation and test function

Protection class

• III Safety Extra Low Voltage (SELV)

IP rating to EN 60529

• IP 65

Admissible ambient conditions

• Service temperature: 0 °C – 70 °C
• Storage temperature: – 40 °C – 80 °C
• Transport temperature: – 40 °C – 80 °C
• Air humidity: 10% – 95%           non-condensing

Weight (dependent on length of electrode)

• NRGT 26-2 1.8 kg (with 300 mm measuring range)
• NRGT 26-2s 5.9 kg (with 275 mm measuring range)

Admissible installation positions

• Vertical
• Oblique to a maximum inclination of 45°. In this case, the length of the electrode rod is limited to 688 mm