Technical data
Model and mechanical connection
■ NGRT 26-2n: Thread G3⁄4 A, EN ISO 228-1
Nominal pressure rating, admissible service pressure and temperature
■ NRGT 26-2n: PN 40, 32 bar (g) at 238 °C
Materials
■ Terminal box: 3.2581 G AlSi12, powder-coated
■ Cover tube: 1.4301 X5 CrNi 18-10
■ Electrode rod insulation: PTFE
■ Screw-in body: 1.4571, X6CrNiMoTi17-12-2
Max. electrode length at 238 °C, all measurements in mm
■ see “How to order and specify”, tables in Fig. 1
■ Do not shorten the electrode rod.
Measurement quality
The information below applies to a compensated uid con- ductivity range from 100 – 10000 μS/cm based on 25 °C.
■ Reading error: +/- 1% of set measuring range at the operating point
■ Resolution of reading on display: 0.1%■ Resolution for internal processing:
15 bits with plus or minus sign (16 bits)
■ Resolution of 4-20 mA output:
15 bits equivalent to 0.49 μA/digit
Supply voltage
■ 24 V DC +/-20%Power consumption■ Max. 7 W
Current input
■ Max. 0.3 A
Internal fuse
■ T2A (slow blow)
Safety cutout at excessive ambient temperature
■ Cutout takes place at an excessive ambient temperature of Tamb. = 75 °C
Analogue output
■ 1 x actual value output 4-20 mA, proportional to level, galvanically isolated
■ Maximum output load 500 Ω
■ M12 connector, 5-pole, A-codedIndicators and controls
■ 1 x red LED for indicating an error state
