Pressure Sensors | Anderson-Negele

In industries such as dairy, brewing, beverage production, winemaking, and juice processing, accurate pressure measurement is crucial for maintaining process efficiency and product quality. Our high-precision pressure sensors ensure reliable monitoring of process pressure while providing essential protection against contamination. In the life sciences sector, where stringent material quality and exact pressure adherence are paramount, our specialized pressure devices meet the demanding requirements of pharmaceutical and biotechnical applications. We offer a variety of options, including sensors for low and high pressures, differential pressure measurement, and remote pressure monitoring, to suit diverse operational needs.﻿

Applications for Hygienic Pressure Sensors

Pressure instruments serve various applications across industries:
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Process pressure control:
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In many production processes or in CIP/SIP processes, inline pressure sensors ensure that the specified positive or negative pressure values in pipes, tubes, lines, process vessels, storage tanks, bioreactors or other containers is maintained. Pressure transmitters and manometers with switching output can report the deviation to the PLC via an alarm signal, so that an automatic, immediate reaction or protective measure can be triggered.
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Hydrostatic level control:
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With pressure sensors, the level in containers can be determined and transmitted with the highest precision where other level measurement techniques are not possible or not precise enough due to tank size, design, materials, media or other reasons.
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Hydrostatic volume control:
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Intelligent pressure sensors with integrated tank linearization can even go one step further: the combination of level, tank geometry, density compensation and temperature compensation allows the volume or mass in pounds, gallons, % to be transmitted directly and with maximum precision at any time and for any medium.
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Differential pressure control:
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By equipping a pressure sensor with two sensor stems and signal converters the parallel detection of two pressure values is possible. This allows for the precise measurement of the differential pressure in a pressurized vessel and thus at same time both the precise metering of the level and the monitoring of the head pressure in a pressure tank, such as a fermenter tank, a sterile tank or a juice storage tank. This digital measuring system is easy to install, does completely without capillaries, is reliable and safe. It can be used to monitor the risk of contamination due to a drop in pressure or the post-fermentation in juice production.

Designs of hygienic pressure sensors

Pressure sensors are classified according to their design into mechanical pressure gauges and electronic pressure transmitters.﻿﻿Pressure Gauges:﻿﻿being mechanical pressure sensors with display, transmit the measured value in analog or digital form directly to an on-site display. There are also pressure gauges with switching output which, as analog pressure switches or digital pressure switches, can transmit the measured value for process control or as an alarm signal to the PLC control center.﻿

Electronic pressure transmitters:
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work with an internal piezoelectric signal converter. They can indicate the measured value in a display, transmit it to the PLC or process it in their intelligent electronic unit itself with other measured data such as temperature. This means that for any requirement a suitable measurement technology with convenient data detection, processing and transmission is available. Another differentiation is the material used for the pressure diaphragm or pressure cell.

Stainless steel diaphragms:﻿﻿These are used in most versions of Anderson-Negele pressure sensors. Depending on the application and medium, the stainless-steel grade and surface roughness can be selected individually.﻿﻿Hygienic design:﻿﻿Anderson-Negele pressure sensors are developed according to the “HYGIENIC BY DESIGN” principle and comply with the principles and specifications of institutions and organizations such as 3-A, FDA or EHEDG with regard to the criteria for non-dead-leg installation, cleanability, material quality and handling.﻿

Pressure cells and measuring ranges

Hygienic Pressure Transmitters

High process temperatures: Special high temperature pressure sensors allow process temperatures up to 480°F.

High pressure: Some applications, such as homogenizers, work with very high pressures. Anderson-Negele offers pressure gauges suitable for pressures up to 15,000 psig.

Field Repair: Modular pressure sensors with Smart Replace Design allow easy on-site replacement of components, simplifying spare parts inventory and increasing sensor availability.

Temperature compensation: With hydrostatic level measurement, a temperature drift can lead to inaccurate output values. With Anderson-Negele sensors the deviation due to the temperature effect is up to 10 times lower than with conventional pressure sensors.

Turndown: Even with turndown up to 10:1, the measurement accuracy at Anderson-Negele remains up to 0.15% due to the use of the calibrated measurement range as reference.

Pressurized tanks: For pressurized tanks, a differential pressure sensor with two sensor stems is the best solution for high-precision level or volume measurement.