Pressure sensors and monitors measure and track the pressure differentials, process pressures, and room pressurisation that so much of pharmaceutical manufacturing and cleanroom operation depends on staying within a validated range.

Pharmaceutical manufacturers and laboratories rely on this equipment because pressure isn't just a process parameter to record; it's often the mechanism that keeps a cleanroom's airflow moving in the correct direction or a sterile process contained, and a pressure excursion can mean a contamination risk long before anyone notices anything visibly wrong. Browse new and used pressure sensors and monitors from verified sellers on Machinery Masters.

What Are Pressure Sensors & Monitors?

A pressure transmitter converts a process pressure reading into an electronic signal that feeds into a control system, PLC, or data logger, giving continuous, automated pressure monitoring rather than relying on someone reading a gauge manually. Differential pressure sensors measure the pressure difference between two points, most commonly between adjacent rooms in a cleanroom or between the two sides of a filter, and that differential reading is what confirms airflow is moving in the correct direction or that a filter hasn't become blocked.

Room pressure monitors take differential pressure measurement a step further, continuously tracking and often displaying the pressure relationship between a cleanroom and its surrounding spaces, with an alarm that triggers the moment a room falls out of its validated pressure cascade.

Digital pressure gauges and process pressure sensors round out the category, giving a direct local reading or electronic signal output for process pressures across manufacturing equipment, utility systems, and process vessels where confirming pressure sits within range matters to both product quality and equipment safety.

Pressure Sensor & Monitor Brands

Endress+Hauser, known for its Cerabar and Deltabar pressure transmitter lines
WIKA, known for its pressure gauges and pressure transmitters
Ashcroft, known for its pressure gauges and pressure transducers for pharmaceutical and biotechnology applications
Setra Systems (a Ralliant company), known for its pressure transducers and room pressure monitors for cleanroom applications
Dwyer Instruments (a DwyerOmega brand), known for its differential pressure sensors and room pressure monitors
Honeywell, known for its Smartline pressure transmitters for life sciences and pharmaceutical applications
TSI Incorporated, known for its PresSura room pressure monitors for cleanroom and pharmaceutical facilities
Vaisala, known for its differential pressure transmitters for cleanroom environmental monitoring

Please verify this brand list against current Machinery Masters marketplace inventory before publishing, as available stock changes over time.

Pressure Sensor & Monitor Product Types

Pressure sensors and monitors divide into a handful of formats depending on what's being measured and how continuously it needs to be tracked.

Process Pressure Transmitters

Process pressure transmitters convert a pressure reading into an electronic signal that feeds into a control system, PLC, or data logger, supporting continuous, automated monitoring across manufacturing equipment and process vessels.

Differential Pressure Sensors

Differential pressure sensors measure the pressure difference between two points, commonly used to confirm cleanroom airflow direction or detect a blocked filter by comparing pressure across its two sides.

Room Pressure Monitors

Room pressure monitors continuously track and display the pressure relationship between a cleanroom and its surrounding spaces, alarming immediately if a room falls out of its validated pressure cascade.

Digital Pressure Gauges

Digital pressure gauges give a direct, local electronic reading of process pressure, offering better readability and often data logging capability compared with a traditional analogue dial gauge.

Analogue Pressure Gauges and Switches

Analogue pressure gauges and pressure switches provide a straightforward, often lower-cost way to read process pressure locally or trigger an action at a defined pressure threshold, without the data output a transmitter or digital gauge provides.

Pressure Sensor & Monitor Applications and Uses

Pressure sensors and monitors support cleanroom integrity, process control, and equipment safety across pharmaceutical manufacturing and laboratory operations.

Cleanroom Pressure Cascade Monitoring

Cleanrooms rely on a validated pressure cascade between adjacent spaces to keep airflow moving in the correct direction and contamination out, with room pressure monitors providing the continuous verification that cascade requires.

Filter Integrity and Blockage Detection

Differential pressure sensors measure the pressure drop across HVAC and process filters, with a rising differential signalling a blockage that needs attention before it affects airflow or process performance.

Process Vessel and Equipment Pressure Control

Process pressure transmitters monitor pressure across bioreactors, autoclaves, and other process equipment, feeding data into control systems that keep a manufacturing process within its validated operating range.

GMP Utility Qualification and Monitoring

Compressed air, nitrogen, and other qualified utilities require pressure monitoring as part of their ongoing qualification, with continuous data forming part of the documentation GMP compliance depends on.

Equipment Safety and Overpressure Protection

Pressure switches and gauges support equipment safety by triggering an alarm or shutdown before a vessel or system exceeds a safe operating pressure, protecting both equipment and personnel from an overpressure event.

How to Choose Pressure Sensors & Monitors

A handful of practical factors determine which pressure sensor or monitor suits a laboratory or facility application.

Match sensor type to your measurement need, choosing a differential pressure sensor for cleanroom cascade or filter monitoring and a process pressure transmitter for equipment and vessel pressure.
Confirm whether continuous data output and alarming are required, favouring a transmitter or room pressure monitor over a standalone gauge for GMP-critical applications.
Check pressure range and accuracy against your specific application, since cleanroom differential pressures and process vessel pressures operate at very different scales.
Consider digital versus analogue format based on whether data logging or simple local reading better suits the application.
For used equipment, request full calibration history, confirm output signal compatibility with your existing control system, and verify accuracy on a test measurement before relying on the equipment for regulated monitoring.

Frequently Asked Questions

Why do cleanrooms need pressure cascade monitoring?

Cleanrooms need pressure cascade monitoring because maintaining a specific pressure relationship between adjacent spaces is what keeps airflow moving in the correct direction and prevents contamination from migrating from a less clean area into a cleaner one. Room pressure monitors provide the continuous verification that this cascade remains intact, alarming immediately if a room falls out of range.

What is the difference between a pressure transmitter and a pressure gauge?

A pressure transmitter converts a pressure reading into an electronic signal that feeds into a control system, PLC, or data logger, supporting continuous automated monitoring, while a pressure gauge gives a direct local reading without necessarily providing a data output. Applications requiring continuous records or automated alarming generally need a transmitter rather than a standalone gauge.

How does a differential pressure sensor detect a blocked filter?

A differential pressure sensor measures the pressure difference across the two sides of a filter, and as the filter accumulates particulate over time, the pressure drop across it increases. Monitoring this differential lets a facility identify when a filter needs replacement before it becomes restrictive enough to affect airflow or process performance.

What is the difference between new and used pressure sensors and monitors?

New pressure sensors and monitors come with a manufacturer warranty and current calibration certification, while used equipment offers meaningful cost savings and suits organisations that can confirm calibration history and check output signal compatibility with existing systems. It is worth verifying accuracy on a test measurement before relying on used equipment for regulated monitoring.

How can I find pressure sensors and monitors on Machinery Masters?

Browse the Machinery Masters marketplace for new and used pressure sensors and monitors from verified sellers, and use the filters to narrow results by brand, range, and application. Contact a seller directly to confirm specifications, service history, and pricing before you buy.