Keller Swiss-Built Series 21C For industrial applications, ratiometric output
Piezo-resistive Pressure transmitter
for industrial aPPlications, RatiometRic outPut
Technology
The C-series transmitters are noted for their ability to deliver high accuracy over a wide temperature range. This is achieved by means of mathematical modelling of the sensor characteristics and digital compensation. In order to do this, each transmitter is gauged over pressure and temperature, programmed and checked after calibration in the same test set-up.
The modular design of the Series 21 C and the extensive vertical range of in-house manufacture provide a high degree of lexibility. The company can quickly adapt to customer requests, even with large production batches. The extensive standard range of connectors and pressure connections means that a CIO measuring cell (Chip-in-Oil) can be quickly welded in from stock if small numbers are involved, and then calibrated to the required temperature range. RoHS conformity and comprehensive EMC protection are a matter of course, therefore qualifying the Series 21 C for use in industrial areas.
Performance features
- Hermetically sealed electronics, extremely compact design
- No internal seals, all made from AISI 316L steel in media contact, IP67
- Extremely accurate, wide temperature range, outstanding long-term stability, no pressure hysteresis
- Ratiometric signal output, 5 V supply voltage, 24 V overvoltage and polarity reversal protection
- Low cost
Typical usage areas
Cooling and air conditioning systems, pneumatic systems, hydraulic systems, compressors,
mechanical engineering, ventilation systems, pump systems etc.
Speciications
Pressure ranges (all intermediate ranges possible)
PA-21 C / PAA-21 C 2!-100 bar max
Overpressure 2,5 x pressure range
PA: Sealed Gauge. Zero at 1000 mbar abs. PAA: Absolute. Zero at vacuum
1)
Accuracy max. !à0,25 %F
2)
Total Error Band 0...50 !a max. !à1,0 %F
-10...80 !a max. !à1,5 %F
1)
Linearity (best itted straight line) + hysteresis + repeatability
2)
Accuracy + temperature coeficients + zero + span tolerance
Stability max. !à0,3 %FS
Storage-/Operating Temperature -40!-125 !
Type 3 wire
Signal Output 0,5!-4,5 V ratiometri
Supply 5,0 VDC !à0,5
Reverse Polarity and Overvoltage Protection !à24 VD
Power Consumption max. 8 mA
Load Resistance > 5 k
Sampling Rate / Bandwidth 2 kHz / 800 Hz
Rise Time T 1 ms
99
Response Time (Supply ON) < 5 ms (0!-99 %
Electrical Connection - Plug: M12 (4-pin), Packard Metri Pack,
industrial standard plug, 9,4 mm contact distance
- Cable (standard length 2 m)
Pressure Connection - 7/16!±-20 UNF outside and insid
- G1/4!
Isolation > 10 M @ 500 VDC
EMC EN 61000-6-2 / EN 61000-6-3 / EN 61326-2-3
3
Dead Volume Change < 0,1 mm
Material in Media Contact - Stainless Steel AISI 316L (DIN 1.4404/1.4435),
- Viton Seal external (no internal seals)
Protection Class M12-/Packard-Plug: IP67 (with corresponding mating plug)
mPm-Plug: IP65 (with corresponding mating plug)
Cable: IP67
Weight 40 g (depending on pressure and electrical connection)
Pressure Endurance > 10 million pressure cycles 0!-100 %FS @ 25 !
Vibration / Shock 10 g, 5!-2000 Hz, X/Y/Z-axis / 75 g sinus 11 m
Oil Filling Silicone oil
Options
Temperature Range Other compensated temperature ranges on request
Pressure Connection, electrical Connection Others on request
OEM Version On request (see box chip-in-oil technology), designs 4 L!-10
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