The SITRANS P Compact pressure transmitter is designed for the special requirements of the food, pharmaceutical and biotechnology industries.
The use of high-grade materials guarantees compliance with hygiene regulations.
Particular value has been placed on a high surface quality. It is therefore possible, for example, to guarantee roughness values down to Ra = 0.4 μm (1.57 · 10-5 inch) in the wetted area (welded seam area Ra < 0.8 μm (3.15 · 10-5 inch)). The system can be electropolished in addition.
A further important feature is the hygiene-based design of the process connection by means of various aseptic connections.
The completely welded stainless steel housing can be designed up to degree of protection IP67.
Using appropriate thermal decouplers, the SITRANS P Compact pressure transmitter can be used for process temperatures up to 200 °C (392 °F).
The SITRANS P Compact pressure transmitter is designed for the special requirements of the food, pharmaceutical and biotechnology industries.
The use of high-grade materials guarantees compliance with hygiene regulations.
The SITRANS P Compact pressure transmitter is available in many versions. Exact adaptation of the pressure transmitter to conditions at the place of use is thus possible
Pressure transmitters for food, pharmaceuticals and biotechnology | |
Mode of operation | |
Measuring principle | piezo-resistive |
Input | |
Measured variable | Gage or absolute pressure |
Measuring range | 0 ... 160 mbar (0 ... 2.32 psi) |
Output | |
Output signal | |
| 4 ... 20 mA |
| 0 ... 20 mA |
Measuring accuracy | According to IEC 60770-1 |
Error in measurement at limit setting incl. hysteresis and reproducibility | ≤ 0.2 % of full-scale value |
Adjustment accuracy | ≤ ±0.2 % of full-scale value |
Step response time | < 20 ms |
Influence of ambient temperature | |
On the enclosure | |
| < 0.2 %/10 K of full-scale value |
| < 0.2 %/10 K of full-scale value |
On the process connection (remote seals) | Zero error (depends on design) |
| |
| 4.8 mbar/10 K (0.069 psi/10 K) |
| 2.3 mbar/10 K (0.92 psi/10 K) |
| 1.6 mbar/10 K (0.64 psi/10 K) |
| 0.6 mbar/10 K (0.24 psi/10 K) |
| |
| 9.5 mbar/10 K (0.14 psi/10 K) |
| 4.1 mbar/10 K (0.06 psi/10 K) |
| 3.9 mbar/10 K (0.05 psi/10 K) |
| 3.9 mbar/10 K (0.05 psi/10 K) |
The zero error specified for the process connection should be considered as a guideline for a standard design. We will produce a detailed system calculation on request. Systems with reduced remote seal errors are available on request. | |
Rated conditions | |
Installation conditions | |
| Any, vertical as standard |
Ambient conditions | |
| -10 ... +70 °C (14 ... 158 °F) |
| -10 ... +90 °C (14 ... 194 °F) |
| Max. 200 °C (392 °F), depending on design |
| IP65, optional IP67 |
| |
| To EN 50081 Part 1, issue 1993 (residential and industrial areas). The unit has no own emissions. |
| EN 50082 Part 2, issue March 1995 (industrial areas) |
Design | |
Weight (without remote seal) | |
| ≈ 460 G (≈ 1.01 lb) |
| ≈ 200 g (≈ 0.44 lb) |
Enclosure | |
|
|
| Stainless steel, mat. no. 1.4404/316L/1.4305 |
Material of union nut | Polyamide (with electrical connection using plug or cable) Electronics unit potted with silicone Internal ventilation for measuring ranges < 16 bar (< 232 psi), through housing thread or connection cable depending on design |
Process connection | |
| See ordering data |
| Stainless steel, mat. no. 1.4404/316L |
Auxiliary power supply | |
Terminal voltage on transmitter | 10 ... 30 V DC |
Rated voltage | 24 V DC |
Certificates and approvals | |
Classification according to pressure equipment directive (PED 97/23/EC) | For gases of fluid group 1 and liquids of fluid group 1; complies with the requirements of article 3, paragraph 1 (appendix 1); assigned to category III, conformity evaluation module H by the TÜV Nord |
Explosion protection | |
| TÜV 03 ATEX 2099 X |
| Ex II 2G EEx ib IIC T6 |
The electronics is potted to protect it against moisture, corrosive atmospheres and vibration.
Compensation of internal atmospheric pressure
Compensation of the internal atmospheric pressure of the SITRANS P Compact pressure transmitters is performed as follows:
In the absolute pressure range there is no need for compensation with respect to atmospheric pressure.
Note: These degrees of protection are only achieved under the following conditions:
Note: The integral EMC measures are only effective if the earth connection is made correctly.
CE marking
The CE marking of the pressure transmitter certifies compliance with the guidelines of the European Council (9/336/EC), the EMC law (13.11.1992), as well as the applicable generic standards.
Interference-free operation in systems and plants is achieved only if the specifications for shielding, earthing, cable routing and electrical isolation are observed during installation and assembly.
Hazardous areas
Note: Electrical equipment in hazardous areas must only be installed and operated by trained personnel.
Modifications to units and connections result in cancellation of the explosion protection and guarantee.
With intrinsically-safe circuits, make sure that equipotential bonding exists throughout the complete cabling inside and outside of the hazardous area. The limits specified in the ATEX approval must be observed.
The process pressure acts on a piezo-resistive semiconductor measuring bridge through a remote seal and a transmission liquid. The pressure transmitter converts the pressure values into a load-independent current.
A compensation network makes the output signal largely independent of the ambient temperature. As a result of a specially adapted remote seal connection with minimized volume, the influence of the process temperature on the output signal is greatly reduced compared to a conventional screw connection.
The pressure transmitters can be powered with a non-regulated DC voltage of 10 to 30 V. Output signals common to measuring technology are available.
SITRANS P, dimensions in mm (inch)
SITRANS P Compact, connection diagram
