KellerSwiss-Built Series 23SEi-25SEi Intrinsically-safe pressure transmitters

Series 23 (S) Ei, 25 (S) Ei and 26 Ei pressure transmitters are all ATEX approved for use in Hazardous Areas where there is a high risk of explosion. Series 23 Ei / 26 Ei The Series 23 Ei / 26 Ei achieve high stability (especially in low pressure ranges) with large piezoresistive capsules and stress-free, floating mountings with O-rings. Series 23 S Ei / 25 Ei / 25 S Ei
The 23 S Ei / 25 Ei / 25 S Ei offer a complete range of „Ported“ and „Flush Diaphragm“ pressure transmitters for ranges of 1bar and above. Still giving high stability and accuracy but without any internal O-rings. This is achieved using either an all welded 316L stainless steel housing and diaphragm or an all welded 316L housing fitted with a brazed Nickel diaphragm.
– A complete range Absolute, barometric, gauge (positive and negative). 16 nominal pressure ranges. Current or voltage output.
– Flexibility A modular concept is used, with fast and economical production achieved by using off-theshelf sensors. Numerous options and variations are available to meet customers’  specific requirements: Pressure ranges, mechanical- and electrical interface, process- and plug connection, signal outputs etc.
– Reliability / Quality 
Each transmitter is subjected to severe test- and calibration procedures. Transmitters are manufactured and tested according to ISO 9001.

Specifications
Pressure Ranges (FS) in Bar
PR/PAA-23 Ei, PR/PAA-25 Ei / 26 Ei -1 -0,5 -0,3 0,3 0,5 1 2 5 10 20
PR/PAA-23 S Ei, PR/PAA-25 S Ei        2 5 10 20
PA-23 Ei, PA-25 Ei       1 2 5 10 20 50 100 200 400 600 1000
PA-23 S Ei       2 5 10 20 50 100 200
PA-25 S Ei       2 5 10 20
Overpressure -1 -1 -1 2,5 2,5 3 4 10 20 40 100 200 300 600 900 1200
PAA: Absolute. Zero at vacuum            PA: Sealed Gauge. Zero at atmospheric pressure (at calibration day)             PR: Vented Gauge. Zero at atmospheric pressure
Linearity
(1)
+ Hysteresis + Repeatability ± 0,5 %FS   
(1)
best straight line through zero
EX-Temperature Classes T6: -40 °C to 70 °C  
     T5: -40 °C to 85 °C
T4: -40 °C to 100 °C
Compensated Temperature Range -10…80 °C
Temperature Coefficients… of Zero, in %FS/°C   of Sensitivity
· Range > 1  bar  0,005 typ. 0,01 max. 0,02 %/°C max.
· Range 1 bar 0,010 typ. 0,02 max. 0,02 %/°C max.
· Range  0,5  bar 0,015 typ. 0,03 max. 0,02 %/°C max.
· Range  0,3  bar 0,025 typ. 0,05 max. 0,02 %/°C max.
Stability  
· Range > 2 bar  0,1 %FS typ.  0,2 %FS max.   
· Range  ≤ 2  bar  2 mbar typ. 4 mbar max.
Signal Output / Type 4...20 mA / 2-Wire  0...10 V / 3-Wire
Supply    10...30 VDC 15...30 VDC
Load Resistance (kΩ) <(U-10 V) / 20 mA ≥ 100
Frequency Response 5 kHz 1 kHz  
Electrical Connector Plug DIN 43650
Dead Volume Change < 0,1 mm3
Material in Media Contact Stainless steel 316L (DIN 1.4435), hard solder
Protection    IP 65
Weight (versions with plug) 23 Ei / 25 Ei: ≈ 260 g    23 S Ei / 25 S Ei: ≈ 130 g
Insulation    > 100 MΩ@50 V
Endurance    > 10 million cycles  0…100% FS at 25 °C
Options
Pressure Port On request
Electrical Output Cable (with reference tube for gauge); protection IP 68
Pressure Ranges Any range between 0,3 and 1000 bar, various units (PSI etc.)
Oil Filling Fluorocarbon oil (O2
-compatible), olive-oil, low temperature oil

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