Keller 25 HTC Specifications

KELLER AG für Druckmesstechnik St. Gallerstrasse 119 CH-8404 Winterthur Tel. 052 - 235 25 25 Fax 052 - 235 25 00
KELLER

Gesellschaft für Druckmesstechnik mbH Schwarzwaldstrasse 17 D-79798 Jestetten Tel. 07745 - 9214 - 0 Fax 07745 - 9214 - 50

Companies approved to ISO 9001 / EN 29001

6/98

www.keller-druck.com

Subject to alterations

HIGH TEMPERATURE PRESSURE TRANSMITTER

FOR BIOTECHNOLOGY / FOOD-INDUSTRIES

This piezoresistive high temperature transmitter (-transducer) is suited for media temperatures
up to 300°C. The pressure, acting onto the flush diaphragm, is transferred over an oil-filled
capillary onto the silicon measuring cell. The capillary has the function of a cooling spiral.
When measuring media with temperatures of 300°C, the temperature at the silicon cell only
increases by 100°C. The integrated amplifier electronics provide a voltage- or current signal
proportional to the pressure.
For highly aggressive media, KELLER offers pressure ports in different materials.

SPECIFICATIONS

PA(A) 25HTC PAA: Zero at Vacuum PA: Zero at ≈1 bar absolute
PR-25HTC PR: Vented Gauge
Pressure Ranges 0,2 0,5 1,0 2,0 5,0 10 20 25 bar
Overload 2,5 2,5 3,0 5,0 7,5 15 30 30 bar

PA(A) 25HTC

PAA: Zero at Vacuum PA: Zero at ≈1 bar absolute

Pressure Ranges 50 100 200 400 600 1000 bar
Overload 75 150 300 500 700 1100 bar

Linearity Error <0,5%FS (optional 0,2%FS and 0,1%FS)
Media Temperature 25…300°C
T.C. of Zero <0,03%FS/°C
T.C. of Sensitivity <0,02%FS/°C
Frequency Range typ. 50 Hz (function of media temperature)
Insulation >10 MΩ @ 50 V

3-Wire

2-Wire
Excitation 13...28 V 10...28 V
Output 0...10 V / 0...20 mA 4...20 mA
Load Resistance (RΩ) >5k (U-10 V)/0,02 A

Pressure Connection G 1/2”, G 3/4”
Material in Media Contact Stainless Steel 1.4435 (316 L)
Length of Colling Spiral 50 mm
Electrical Connection Binder Plug Series 723
Weight ≈ 220 g

Mounting Horizontal position (carrying-off of heat).

Cooling spiral exposed to room temperature.

Options Programmable (25 HTC-PRO).

Others on request.

SERIES 25 HTC

SERIES 25 HTC

14

15

50

G 1/2"

65

ø 25

HEX 27

ELECTRICAL CONNECTIONS

3-Wire 2-Wire

1: white GND

2: red +OUT OUT/GND

3: black +Vcc +Vcc