NAH 8254

Hydraulic Pressure Switch

The hydraulic pressure switch NAH 8254 with 1 or 2 switching outputs and increased accuracy of 0.3% has an exceptionally long-term stable thin-film-on-steel sensor cell with triple (optionally 5-fold) overpressure protection. The robust design and the wide temperature range from -40°C to +125°C make the NAH 8254 the ideal solution when exact and reliable switching signals under rough environmental conditions are required.

Features

  • Switching accuracy 0.3 %
  • 1 or 2 PNP transistors
  • Switching current up to 400 mA
  • With inverse-polarity protection and short-circuit strenght
  • Optional: 5-fold overpressure resistance
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Technical Data

Applications

Machine tools, Hydraulics, HVAC, Refrigeration, Process technology, Water treatment

Category

Electronic pressure switches

Accuracy @ 25°C typ.

± 0.3 % FS typ.

Dielectric strength

50 VAC, 50 Hz

Measuring principle

Thin film on steel

Vibration

15 g RMS (20...2000 Hz) (EN60068-2-64)
25 g sin (80...2000 Hz), 1 oct./min, (1x @ 25°C) (EN60068-2-6)

NLH @ 25°C (BSL) typ.

± 0.2 % FS typ.

Pressure connections

G1/4" m, G1/4" m (Manometer), 1/4"NPT m, 1/8"NPT m, 7/16"-20UNF SAE J512 f, 7/16"-20UNF SAE4 m, 7/16"-20UNF m, R1/4" m, R1/8" m, M10x1 m, M12x1.5 m

Media temperature

–40°C ... +125°C

Shock

50 g / 11 ms
100 g / 6 ms Male electrical plug M12x1 (EN60068-2-27) 2)

Electrical connections

M12x1; Cable IP67

Long term stability 1 year typ.

< ± 0.1 % FS typ.

Ambient temperature

–40°C ... +125°C
(Cable PVC 22: -5°C ... +60°C)
(Cable PUR 24: -40°C ... +70°C)

Protection

IP65, IP67

Output signal

Switching output:
1 or 2 PNP transistors

TEB typ. @ -25 ... +85°C

± 1.0 % FS typ.

Measuring range

0 ... 2.5 to 0 ... 600 bar
0 ... 30 to 0 ... 7500 psi