Keller Swiss-Built Series 23(S)Y-25Y Piezoresistive Pressure Transmitters

The Y-line transmitters have an extremely small temperature error. This is achieved using an additional circuit containing a temperature sensor that subdivides the temperature range into fields that are 1,5 Kelvin (K) wide. The TK zero and TK compensation values are calculated for each field and programmed into the additional circuit. During operation, these values are fed into the analogue signal path depending on the temperature. Each temperature is the „calibration temperature” for this transmitter. The accuracy thereof is mainly determined by linearity. 120 fields are available, representing a possible temperature range of 180 K. The wider the temperature range, the greater the amount of testing that is needed to minimise the inaccuracy of the mathematical model. The Series 23 (S)Y/25 Y product line is outstanding due to its extreme ruggedness towards electromagnetic fields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated fields.
· Series 23 Y Ranges 0,2…2 bar Floating mounted sensor. Internal O-Ring.
· Series 23 SY Ranges 1…1000 bar Fully welded (no internal seals)
· Series 25 Y Ranges 0,5…100 bar Flush, fully welded.
A Comprehensive Range Absolute, barometric, gauge (positive and negative pressures). Many nominal pressure ranges.
Current or voltage output.
Flexibility
A modular concept is used, with fast and economical production achieved by using off-the-shelf sensors. Numerous options and variations are available to meet customers’ specific requirements: Pressure ranges, pressure ports, signal outputs, electrical connectors, etc.

Specifications
1)
Best fitted straight line, including Hysteresis + Repeatability              
2) 
Linearity + Hysteresis + Repeatability + Temp. Coeff. + Zero + Span Tolerance
Storage-/Operating Temperature -40…100 °C
Stability   Range  > 2 bar  0,1 %FS typ.  0,2 %FS max. 
   Range  ≤ 2 bar  2 mbar typ. 4 mbar max.   
Type 2-wire 3-wire 3-wire 3-wire
Signal Output 4...20 mA 0...10 V 0...5 V 0,5…4,5 V
Limitation Signal Output 3,2...22,3 mA -1,2...11,2 V -0,6…5,6 V 0,1...4,9 V
Supply 8...32 VDC  13...32 VDC  8…32 VDC 8...32 VDC
Load Resistance < (U-8 V) / 0,025 A > 5 kΩ > 5 kΩ > 5 kΩ
Limiting Frequency 2 kHz 2 kHz 2 kHz 2 kHz
Power Consumption max. 5 mA  max. 5 mA max. 4 mA
 
Electrical Connection - Plug: Binder-423/723 (5-pole), GSP (DIN 43650), M12 (4-pole), Souriau (MIL-C26482)
   - Cable
Pressure Connection Series 23 (S)Y:  G1/4”, 1/4”-18NPT, G1/2”, G1/2” Mano
   Series 25 Y: G1/2”
Response Time (Supply ON) (0…99 %) < 5 ms
Insulation > 10 MΩ@300 V
EMC EN 61000-6-2: 2005  /  EN 61000-6-3: 2007  /  EN 61326-2-3: 2006
Dead Volume Change < 0,1 mm3
Material in Media Contact - Stainless Steel AISI 316L (1.4404/1.4435)
   - USIT or Viton®
 O-Ring (no internal seals, except for 23 Y)
Protection Class Plug: IP65…IP67 (depending on connection and with corresponding mating plug)
   Cable: IP54       Cable Screw Connection: IP68
Weight ≈ 120 g (depending on version)
Endurance > 10 million cycles, 0…100 %FS at 25 °C
Oil Filling Silicone oil 
Options
Temperature Range Other temperature ranges on request. Maximal range: -40…+120 °C
Oil Filling  Fluorocarbon oil (O2
-compatible), olive-oil, lowest temperature oil (-55 °C)
Pressure Ranges Intermediate ranges on request
Pressure Connection, Electrical Connection Others on request
Error Band
2)
 @ 0…50 °C Error Band
2)
 @ -10…80 °C
Pressure Range Linearity
1)
typ. max. typ. max.
2…1000 bar ±0,25 %FS ±0,3 %FS ±0,5 %FS ±0,4 %FS ±0,7 %FS
0,5…< 2 bar ±0,25 %FS ±0,6 %FS ±1,0 %FS ±0,8 %FS ±1,5 %FS
0,2…0,5 bar ±0,50 %FS ± 2 mbar ± 5 mbar ± 3 mbar ±7,5 mbar
Pressure Ranges (FS) in bar
PA(A)/PR-23 Y -1 -0,5 -0,2 0,2 0,5 1 2
PA(A)/PR-23 SY  (PR-Version ≤ 20 bar) -1      1 2 5 10 20 50 100 200 400 600 1000
PA(A)/PR-25 Y     (PR-Version ≤ 20 bar) -1 -0,5 0,5 1 2 5 10 20 50 100
Overpressure -1 -1 -1 2,5 2,5 3 4 10 20 40 100 200 300 600 900 1100
PAA: Absolute. Zero at vacuum    PA: Sealed Gauge. Zero at 1000 mbar abs    PR: Vented Gauge. Zero at atmospheric pressure

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