KELLER
PIEZORESISTIVE PRESSURE TRANSMITTERS
ABSOLUTE-, GAUGE- AND DIFFERENTIAL PRESSURE
SERIES 23 / 25
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
· Series 25
Male pressure port
Accuracy 0,5%FS, optional 0,1 and 0,2%FS
Flush diaphragm
Accuracy 0,5%FS, optional 0,1 and 0,2%FS
• A Complete Range
Absolute, barometric, gauge (over- and underpressure) and differential for wet/wet applica-
tions. 13 nominal pressure ranges. Current or voltage output.
• Flexibility
A modular concept uses the selection of off-the-shelf capsules, allowing a customised pro-
duction. 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- and intrinsically safe
versions.
Series 23
• 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
· PA-23/25
· PR-23/25
· PD-23
Absolute Pressure Transmitter (Zero at 0 bar abs.)
Sealed Gauge Pressure Transmitter (Zero at ≈ 1 bar abs.)
Vented Gauge Pressure Transmitter (Zero at atmospheric)
Differential Pressure Transmitter (wet / wet)
Series 25
SERIES PD 23
SERIES 23
SERIES 25
WITH DIN 43650 CONNECTOR
WITH DIN 43650 CONNECTOR
WITH CABLE
Cable
ø 7,3 mm
35 mm
ø22
75 mm
ø22
75 mm
ø22
72 mm
16
10
16
G 1/4"
Female
Port
G 1/4"
Female
Port
Viton O-Ring Seal
or
Copper-Washer
HEX 27
ø40
HEX 27
12
14
Viton
Flat Seal
59,1
G 1/4"
G 1/2" or G 3/4"
Subject to alterations
4/99
KELLER AG für Druckmesstechnik
KELLER Gesellschaft für druckmesstechnik mbH
St. Gallerstrasse 119
Schwarzwaldstrasse 17
CH-8404 Winterthur
D-79798 Jestetten
Tel. 052 - 235 25 25
Tel. 07745 - 9214 - 0
Fax 052 - 235 25 00
Fax 07745 - 9214 - 50
Companies approved to ISO 9001 / EN 29001
Internet: http://www.keller-druck.ch