Food industry makes extensive use of pressure and level transmitters in production lines outputting canned, fermented products (kvass, beer, wine), juices, milk and dairy products, confectionery, sugar, vegetable oil etc.

Homogenizers, sterilizers, pasteurizers, evaporators and autoclaves are the units that receive pressure measuring devices. Various containers and tanks, including those designed for blending, buffering, fermentation, BBT and milk tanks typically need level controlling transmitters.

Food grade pressure and level transmitters are designed with the specifics of food production in mind, including strict hygienic requirements and technological processes temperature regimes.

Housing

Housing of transmitters designed for food and processed food industry ensures the convenience of their cleaning.

Pressure Ports

Special food-grade ports also aim to simplify cleaning and mounting.

Food-grade Pressure Ports

DIN 11851 (hygienic union)	Clamp
DIN 11851 hygienic union is widely used throughout Europe, most often in beverages production lines. From the point of view of hygiene, they are not perfect: some areas of such unions are subject to contamination. A transmitter with DIN 11851 port cannot be mounted flush with the process, there are always "dead" spots present.	The American Clamp standard union is used both in food and pharmaceutical industries. Clamp is good when connecting pipes to tanks. This type of union ensures the seals receive the load uniformly, which is a plus. The design is less bulky than that of DIN 11851, but mounting is more complicated.

Varivent®	Flanged connections
Varivent® (built-in housing) connection is used to install instruments and devices into pipes. It allows flush mounting and ensures there are no dead spots,  bringing the device right into the flow. The features of its design eliminate pressure loss in the housing. It is very easy to clean. A special clamp secures it in place.	Flanged connection is another type of connection used in the food industry. There are four and more bolts to this connection, which makes it very reliable. However, flanged connection is hard to mount, and the seal can suffer nonuniform load when the bolts are tightened unevenly.

Diaphragm materials

Transmitters designed for aggressive media receive diaphragms resistant to acids and alkalis: steel 1.4435, Hastelloy®, Tantalum, Monel, 99.9% ceramics

Other design features

The cavity between the diaphragm and the sensor in a food-grade pressure transmitter is filled with special edible oil. Thus, if the diaphragm is accidentally damaged, the food only receives safe edible oil from the transmitter. Food-grade pressure transmitters designed for cooled media (beer, milk, etc.) have a special dielectric gel as a fill liquid; this gel fills the electronic unit case and prevents condensation inside the transmitter.

Food-grade hygienic pressure transmitters by BD SENSORS RUS

DMP 331P Range: from 0 ... 0,1 to 0 ... 40 bar Accuracy: 0.25-1% of span Ports: VARIVENT, flanged, DIN 11851, Clamp. Diaphragm: stainless steel 1.4435; Hastelloy; Tantalum	DMP 331P Compact pressure transmitter with flanged connection, media separator and 150 °C radiato
DMK 331P Range: from 0 ... 1 to 0 ... 400 bar Accuracy: 0,25; 0.5% of span Ports: VARIVENT, flanged, DIN 11851, Clamp, sandwich DIN 2501 Diaphragm: stainless steel 1.4435	DMK 331P pressure transmitter sensor with ceramic diaphragm and Clamp pressure port
x|act i Range: from 0 ... 0,4 to 0 ... 600 bar Accuracy: 0.1% of span Ports: VARIVENT, flanged, DIN 11851, Clamp, sandwich DIN 2501 Diaphragm: stainless steel 1.4435	x|act i pressure transmitter with Clamp connection
DMD 331-A-S-LX/HX Range: up to 250 bar Accuracy: 0.075; 0.04% of span Ports: flanged, remote diaphragms Diaphragm: stainless steel, Hastelloy; Tantalum	DMD 331-A-S with remote diaphragms
DS 200P Range: from 0 ... 0,1 to 0 ... 40 bar Accuracy: : 0,25; 0.35; 0.5% of span Ports: VARIVENT, flanged, DIN 11851, Clamp, sandwich DIN 2501 Diaphragm: stainless steel 1.4435	Pressure switch hygienic union
x|act ci Range: 0 ... 0.06 to 0 ... 20 bar Accuracy: 0.2% of span Ports: VARIVENT, flange, DIN 11851, "Clamp", "sandwich" DIN 2501 Diaphragm: Al2O3 ceramics 99%	x|act ci pressure transmitter with hygienic union
DMP 331Pi Range: 0 ... 0.4 to 0 ... 40 bar Accuracy: 0.1% of span Ports: VARIVENT, flanged, DIN 11851, Clamp, sandwich DIN 2501 Diaphragm: stainless steel 1.4435; Hastelloy; Tantalum	DMP 331Pi pressure transmitter with hygienic union