Product Description:
Series 22 offers a reliable cost effective solution for customers requiring medium to high quantities,
of mass produced transmitters. Utilising the KELLER automatic brazing lines, this new technology allows crevice-free construction of the pressure port with no internal seals or O-rings, making possible high volumes at low cost. In the brass 22 M, a steel insert and a nickel diaphragm are brazed into a brass housing. In the steel 22 S, all parts are stainless steel (AISI 316 L). The glass
feed-through header and silicon pressure sensor are welded to the steel insert underneath the oil illing.
The electronic circuit is itted to the Packard plug. EMC-protection-components are mounted on the plug side, the ampliier on the sensor side. A lexible printed circuit !°TAB!± connects the senso. Series 22 M 3/8!±-24 UNF-2 with the electronics. The transmitters are designed to have exceptionally good EMC ratings and operate over a wide temperature band, ideal for automotive, hydraulic and refrigeration control applications.
PAA-22 M / PAA-22 S 5 10 20 30 bar
PA-22 M / PA-22 S 5 10 20 30 50 100 200 250 bar
Overpressure 15 30 60 90 150 250 300 300 bar
The Series 41 X combines the ceramic measurement cell for low pressure ranges with the µP electronics of the digital Series 30 transmitter. The pressure values from the signals of the pressure and temperature sensors are determined by polynomial compensation (see reverse). The values can be displayed and stored on a PC via an RS485 interface and programming can also be carried out. The transmitters are calibrated to the base range. The PROG30 software permits programming of the analog output signal in each section of the range within the base range (e.g. range 100 mbar. Output 4…20 mA for 20…60 mbar). With KELLER RS converters K-100 Series, up to 128 transmitters can be hooked together into a bus system and read by means of a PC or laptop. READ30 software allows the current pressure of each transmitter to be read or the pressure activity of several transmitters to be recorded or stored whilst “on line”.
PR-41 X (relative) PD-41 X (diff.) 30 100 300 mbar
Overpressure 300 1000 1500 mbar
The KELLER Series 21 / 21 PRO are extremely reliable and cost effective pressure transmitters. These pressure transmitters use a programmable KELLER-ASIC microchip called!±ProgRes!± (programmable resistors).
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.
Specifications
Pressure ranges (all intermediate ranges possible)
PA-21 C / PAA-21 C 2!-100 bar max
Overpressure 2, 5 x pressure range Piezoresistive Pressure transmitters for industrial aPPlications
series 21 G
• Weighing only 30 grams, the smallest known transmitter with fully welded stainless steel wetted parts
• High EMC protection. Protection class IP65/IP67
• Highest stability due to special heat treatment and annealing procedures
Series 21G, is the result of a 20 year long development programme for industrial transmitters. ‘G’ stands for ‘Graduate’; this product has received ‘summa cum laude’ the highest honours. The standard mPm electrical connector overlaps the body to remind us of ‘mortar board hats’ on graduation day.
These piezoresistive silicon pressure transmitters are produced on the new KELLER automatic brazing lines, making possible the mass production of high quality pressure transmitters at low cost.This new technology allows the crevice-free construction of the pressure port without using seals or O-rings. In the brass sensor line (Series 21 MC), a steel insert and a nickel
diaphragm is brazed into a brass housing. In the steel sensor line (Series 21 SC), all parts are of stainless steel (AISI 316 L). The header with the silicon pressure sensor and glass lead through pins is welded to the steel insert underneath the oil filling. The tiny chip-on-board amplifier (weight 1 gram) with the KELLER-specific !°PROGRES!± circuit is mounted direct
on the glass feed-through pins. It is then encapsulated in silicone compound for humidity and vibration protection.
Note: The cable version of the transmitters has exceptionally high RFI protection.
Sealed Gauge (zero at 1 bar abs.) 5102050100200bar
Series 21 MC Overpressure102040100200300bar
Brass Sensor Head, Steel Body 3-Wire 4-Wire
2-Wire Excitation8!-28 V4, 75!-5, 25 V5!-1
Eries 21 sc series 21 mc s
This new range of KELLER OEM pressure transmitters offers the user the high accuracy and stability of the KELLER piezoresistive pressure capsule in a low cost OEM package. Applications include refridgeration, hydraulic controls, air compressors, ink jet printers, vacuum pumps etc.
The Series 21 R is offered with soldered brass transducers (Series 21 MR), soldered steel transducers (Series 21 SR) or fully welded (Series 21 R), all providing a highly stable measuring cell with negligible hysteresis, unrivalled linearity, high output and a life of millions of pressure cycles.
Outputs: A 2-wire (4!-20 mA) or 3-wire version with voltage output is available as an output signal. For a ratiometric 0, 5 to 4, 5 V version, we refer to the KELLER Series 21 G product range. EMC: The 21 Y product line is outstanding due to its extreme ruggedness towards electromagnetic ields. The limits of the CE standard are undercut by a factor of up to 10 with conducted and radiated ields. These transmitters are also extremely immune to external voltages between the housing and the electrical connection, which is particularly important when frequency converters are being used. The high insulation voltage of 300 V make this product ideal for use in the harshest of environments.
PR-21 Y 2!-10 bar FS
PAA-21 Y / PA-21 Y 2!-100 bar FS
Overpressure 2 x pressure range, max. 1100 bar
PAA: Absolute. Zero at vacuum PA: Sealed Gauge. Zero at 1000 mbar abs. PR: Vented Gauge. Zero at atmospheric pressure
Accuracy
Series 22 DT was developed and homologated specially for use in so-called °∞bivalent vehicles fitted with engines for combined natural gas/gasoline operation. The unconventional design with a small mass swept by the flow results in a fast response with temperature changes, the temperature being measured by an NTC or PT sensor located directly behind
the stainless steel separating diaphragm. The same diaphragm transmits pressure via a capillary to a stress-free mounted silicon measuring cell. The signal processing for pressure and temperature is carried out by an electronic module connected to the sensors by flexible conductors. Mounted to the back of the electronic module, which is directly connected to the 6-pole plug connector are the EMC protection components. A special feature is the immunity from interference from electromagnetic fields up to 200 V/m.SPECIFICATIONS
Pressure Range PA-22 DT14 bar Sealed Gauge. Zero at atmospheric pressure (at calibration day)
Series 22 offers a reliable cost effective solution for customers requiring medium to high quantities, of mass produced transmitters. Utilising the KELLER automatic brazing lines, this new technology
allows crevice-free construction of the pressure port with no internal seals or O-rings, making
possible high volumes at low cost. In the brass 22 M, a steel insert and a nickel diaphragm are
brazed into a brass housing. In the steel 22 S, all parts are stainless steel (AISI 316 L). The glass
feed-through header and silicon pressure sensor are welded to the steel insert underneath the
oil illing.
The electronic circuit is itted to the Packard plug. EMC-protection-components are mounted on
the plug side, the ampliier on the sensor side. A lexible printed circuit !°TAB!± connects the senso
Series 22 M
3/8!±-24 unf-2
with the electronics. The transmitters are designed to have exceptionally good EMC ratings and
operate over a wide temperature band, ideal for automotive, hydraulic and refrigeration control
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.
These piezoresistive transmitters have been designed for precision applications in industrial environments for pressures ranging from 0, 2 to 1000 bar, liquids or gas.
Series 23: Male pressure port
Series 25: Flush diaphragm
A Complete Range Absolute, barometric, gauge (over- and underpressure) and differential for wet/wet applications.
13 nominal pressure ranges. Current or voltage output. Flexibility A modular concept uses the selection of off-the-shelf capsules, allowing a customised production. Numerous options and variants are available, fully adapted to the customer’s requirements: Mechanical and electrical interface, ports, signal outputs, materials in media contact, oil filling, oxygen-compatibility, special features, flameproof versions…Reliability / Quality These transmitters use the highly stable KELLER Series 10 capsules, proven in millions of applications throughout the world. Each capsule is subjected to severe tests and calibration procedures. The transmitters are manufactured and tested according to ISO 9001 / EN 29001.The type of the transmitter is defined according to the reference pressure:
PAA-23/25 Absolute Pressure Transmitter (Zero at 0 bar abs.)
PA-23/25 Sealed Gauge Pressure Transmitter (Zero at ≈ 1 bar abs.)
PR-23/25 Vented Gauge Pressure Transmitter (Zero at atmospheric)
PD-23 Differential Pressure Transmitter (wet / wet)
In addition to the classical analog output signal (Series 23 Ed and 25 Ed), a digital solution based on the successful high-precision Series 30 X transmitters is also
available (33 X Ed and 35 X Ed). nalog transmitters, Series 23 Ed and 25 Ed This series is based on the stable piezoresistive transducer with analog electronics.
Specification Standard Pressure Ranges (FS) and Overpressure in bar
PR-23/25 Ed, PR-33/35 X Ed -1 1 3 10 30
PA(A)-23 Ed, PA(A)-33 X Ed 1 3 10 30 100 200 300
PA-25 Ed, PA-35 X Ed 1 3 10 30 100
Company Contact:
Contact Name: Rona Zhang
Company Name: Contranspower Co, Ltd
Email:
Tel: 862885218395
Fax:
Street Address: China Sichuan
Chengdu Wuhou
Chengdu, Sichuan 610045
China
Member name: contranspowers
Country:
China
Member Since: 31 July 2014
Total Leads:
140 contranspowers Import Export Business Leads
Business focus: Actuator, Cylinder, Solenoid Valve, Transmitter
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