Hygienic applications require that all parts in contact with the process media must have a high level of cleanliness and include precautions against contamination.
A hygienic pressure sensing device will have an open flush diaphragm with no hidden volumes or crevices so that the surfaces in contact with the process media can be easily cleaned and discourage the build up of contaminants such as bacterial or fungal growth.
Contents
Pressure sensors for hygienic installations
DMP331P Hygienic Flush Pressure Transmitter
DMK331P Flush Diaphragm Pressure Sensor
Xacti Rangeable Flush Pressure Transmitter with LCD Readout
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor
XMPi Process Plant Gauge and Absolute Pressure Transmitter
DS201P High Range Flush Pressure Gauge, Switch and Sensor
35X HTT High Temperature Compensated Pressure Sensor
Pressure gauges with hygienic fittings
- DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor
- DS201P High Range Flush Pressure Gauge, Switch and Sensor
Baroli 05P High Range Flush Diaphragm Digital Pressure Gauge
Baroli 02P Low Range Flush Diaphragm Digital Pressure Gauge
Hygienic Product Features
Material
The preferred type of material for hygienic parts is polished stainless steel 316L because it is easy to clean, can be welded without the introduction of another material and has good corrosion resistance to various media including cleaning agents.
Process Fittings
The types of process connections used for fitting hygienic pressure instrumentation are designed to reduce crevices and hidden spaces where residue from the process media can become trapped and lead to the growth of micro-organisms causing product contamination. A popular type of hygienic fitting is the Tri-clamp which uses a double hinged clamping ring that is tightened around two flanged surfaces separated by an elastomer O ring seal.
Food Grade Oil Fill
Some designs of pressure sensing technology include an oil-fill which is contained behind an thin metal isolation diaphragm. Since there is a risk that a thin and exposed diaphragm could be damaged and leak its contents into the process, it is necessary to use an oil that will not cause harm if accidentally mixed with the process media. The types of oil used include Peanut oil, Olive oil and Food grade silicone oils.
Industry Types
The types of industry that use hygienic pressure measurement equipment include food processing, breweries, drink production, pharmaceuticals, medicines, biotechnology and medical equipment.
