Smart SSI

Pressure Based Level Transmitters

We offer pressure based level measurement solutions which use pressure sensors known for their high precision and workability with a wide range of pressure.

With its partnership with Keller, Sapcon features pressure measurement solutions for water and waste-water industries. KELLER AG für Druckmesstechnik is a leading manufacturer of isolated pressure transducers and transmitters with its headquarters based in Winterthur (Switzerland).

Hydrostatic Pressure Based Level Transmitter

Principle
Hydrostatic pressure is proportional to the height of a column of fluid. The pressure generated depends on the density of the fluid and the gravitational pull acting on it. Level probes measure this pressure, with the ambient pressure also factored into their
measurement method or design. Pressure measurements require high long-term stability in order to meet the standard required of a static measurement.

Features and Unique Characteristics

  • High precision and long-term stability, no pressure hysteresis
  • Digital interface for reading off temperature measurements (useful in calculating density)
  • Well protected against environmental influences
  • Over-voltage and reverse polarity protection
  • Sturdy, rust-free housing
  • Small diameters to fit dip pipes upwards of 16 mm
  • Large selection of pressure ranges
  • Various materials and cables available to ensure media compatibility

Two kinds of pressure transmitters for level measurement are offered: Piezo resistive transmitters and Capacitive Transmitter for low pressure range. Their respective models with technical specifications are stated below.

1. PIEZO RESISTIVE TRANSMITTERS (RANGES FROM 2 TO 300 mH20)

1a. Model – Series 26W / 26W Ei (Analog Transmitter)
PA (Sealed Gauge), PAA (abs)
Range: 2 – 300 mH2O, From 0.2 To 30 Bar
Supply: 13-28 V DC (Other on Request)
Output: 4..20mA, 0..20mA, 0…10 V, 100mV, 0..5V and Others
Accuracy : +/-0.25% FS
Housing: Stainless Steel SS 316L, IP-68
For Hazardous Application:  (ATEX) II 1 G Eex ia IIC T6 to T4
Series26W-26WEi
1b. Model – Series 27W (Analog Transmitter)
PA (Sealed Gauge), PAA (abs)
Ranges from 2 to 300 mH2O, from 0.2 to 200 bar
Supply: 13-28 V DC (Other on Request)
Output: 4…20mA, 0..20mA, 0…10 V, 100mV, 0..5V and Others   
Accuracy: +/-0.25% FS
Comp Temperature Range: 0…50°C (Other on Request)
Housing: Stainless Steel, IP-68 (19mm dia)
Series27W
1c. Model – Series 36XW / 36XW Ei (Digital Transmitter , Programmable)
PA (Sealed Gauge), PAA (abs)
Ranges: 1 To 300 mH2O, from 0.2 To 30 Bar
Output: RS 485 Modbus,  or 4..20 mA, 0…10V, 0..5 V and Others
Supply: 13-28 V DC (Other on Request)
Accuracy: +/-0.5% FS, +/-0.1% FS (0..50°C)
Temperature Range: 0..50 Deg C (Other on Request)
Housing: Stainless Steel SS 316L, IP-68
For Hazardous Area (ATEX) II 1 G Eex ia IIC T6 To T4
Series36XW-36XWEi

2. CAPACITIVE TRANSMITTER FOR LOW PRESSURE RANGE

2a. Model – Series 36XS “Stretto” Line
PAA (abs)
Rangeable Diameter: 16 mm
Range: PR 1,3 and 10 bar
Output: 4-20mA, RS-485
Supply: 10 – 30 V DC (Others on request)
Accuracy : +/-0.2% FS
Comp Temperature Range: 0…50°C
Stainless Steel 316L, IP-68, Dia 16mm
Series36XS
2b. Model – Series 46W (Analog Transmitters)
PR (ref), PA (Sealed Gauge), PAA (abs)
Ranges from 0.1 to 30 mH2O
From 10 To 3000 mbar
Output: 4…20mA, 0..20mA, 0…10V
Supply: 13-28 V D (Other on Request)
Housing: Stainless Steel SS 316L
Diaphragm: Ceramic, Gold Pleated, IP-68, Diameter 38 MM
Series46W 
2c. Model : Series 46X / 46X Ei (Digital Transmitter, Programmable)
PR (ref), PA (Sealed Gauge), PAA (abs)
Ranges: 30/100/300 mbar (Other on request)
Output: 4…20mA, 0..20mA, 0…10V, RS (485 Modbus)
Supply: 13-28 V DC
Accuracy: +/-0.1% FS (0…50°C)
Housing: Stainless Steel SS 316 L
Diaphragm: Ceramic, Gold Pleated, IP-68, Diameter 38 MM
For Hazardous Area : ATEX, II 1/2 G Eex ia IIC T4
Series46X-46XEi