±2% of measured value**(in reference conditions where the fluid is water at ambient temperature, the sensor is inserted at the correct depth and there is a fully developed flow profile which is in compliance with ISO 7145- 1982 (BS 1042 section 2.2))
Minimum Conductivity:
20 μS/cm
Wetted Materials • 316L stainless steel body and electrodes • PVDF Insulator • O-rings: • Cable:
table 1 3-2552 table 2 -1 -2 -3
table 3 1 2 3 4
table 4 -A -B
table 5 -11
FPM (standard)
4-cond + shield, PVC jacket (Fixed cable models) or Water-resistant rubber cable assembly with Turck® connector
NEMA 6P
power requirements • 4 to 20 mA:
• Frequency: • Digital (S3L):
24 VDC ±10%, regulated, 22.1 mA maximum
5 to 24 VDC ±10%, regulated, 15 mA maximum
5 to 6.5 VDC 15 mA maximum • Reverse polarity and short circuit protected -12
process connection options - choose one 1¼ inch NPT process connection threads** 1¼ inch ISO process connection threads**
1½ inch (2552-3 only) NPT process connection threads** 1½ inch (2552-3 only) ISO process connection threads** cable and connector options - choose one Fixed Cable, 7.6 m (25 ft); no connector
Watertight sensor connector; cable sold separately output options - choose one
Frequency or Digital (S3L); for use with any Signet Flow Instru- ment or the 8900 Multi-Parameter Controller
4 to 20 mA output
• Minimum process liquid conductivity requirement is 20 μS/cm. • •1½ x 1¼ inch and 2 x 1¼ inch (2552-1 and 2552-2 only) retrofit adapters are available for replacement installations of Signet 2550 and 2540 sensors.
Model 2552 Ordering Notes
1) Sensor insertion depth is the distance from the bottom of the sensor housing to the tip of the sensor.
2) Hot-Tap installations require a 1¼ in. or 1½ in. ball valve. 3) See Sensor Selection Guide on previous page to determine the sensor length required.