Differential Pressure
Instruments

IAQ Detectors, the instrumentation brand of Ace Instruments, manufactures CE certified differential pressure indicators and transmitters for cleanrooms, pharmaceutical facilities, and HVAC ductwork. Each instrument supports diaphragm-based DP measurement with output via Modbus RS-485, 4-20mA, or 0-10V for BMS and cascade-monitoring integration.

Differential pressure is the standard method for verifying cleanroom containment. ISO 14644-1 specifies a minimum positive pressure of 12.5 Pa for ISO Class 5 cleanrooms, and EU GMP Annex 1 (2022) requires a monitored, cascading pressure differential between adjacent cleanliness grades.

Diaphragm DP sensingModbus RS-4854-20mA / 0-10VCE certified3 instruments
Browse all pressure instruments →Talk to an application engineer

Cleanroom DP reference (Pa)

012.52550
Below containment threshold<12.5 Pa
ISO 14644-1 ISO 5 minimum≥12.5 Pa
Typical cleanroom cascade range12.5–25 Pa
AHU filter alarm trendRising DP
All pressure instrumentsWall-Panel mountDuct type
3 instruments shown
Wall mountCleanroom Differential Pressure Indicator

Cleanroom Differential Pressure Indicator

ΔP
Local displayPanel mountPa / inWC
Cleanrooms · Isolation roomsView instrument →
Wall mountDifferential Pressure Transmitter

Differential Pressure Transmitter

ΔP
RS-4854-20mA0-10V
Cleanrooms · GMP facilitiesView instrument →
Duct typeDuct Static Pressure Transmitter

Duct Static Pressure Transmitter

ΔP
RS-485HVACFan control
AHU · DuctworkView instrument →

Instrument comparison

Quick specification reference across the range

FeatureCleanroom Differential Pressure IndicatorDifferential Pressure TransmitterDuct Static Pressure Transmitter
Mount typeWall / PanelWall / PanelDuct / In-line
Local display✓✓N/A
Analog output (4-20mA / 0-10V)N/A✓✓
Modbus RS-485N/A✓✓
Best forRoom-level visual DP checkGMP cascade monitoringFan speed / DCV control

Common applications

Where continuous differential pressure monitoring is required

🏥

Hospitals & labs

Isolation rooms and cleanrooms monitor DP continuously to maintain containment direction per ASHRAE 170-2021 and ISO 14644-1.

🧪

Pharmaceutical GMP facilities

EU GMP Annex 1 (2022) requires a monitored, cascading pressure differential between cleanroom grades to prevent cross-contamination.

🏢

Commercial buildings

AHU filter banks are monitored for rising differential pressure as a maintenance and energy-efficiency indicator.

🏫

Educational institutions

Laboratory fume hood and isolation spaces in institutional buildings monitor DP for occupant safety.

Expert guidance

Not sure which pressure instrument fits your cleanroom or duct?

Our application engineers will recommend the right instrument based on your cascade design, GMP grade requirements, and BMS integration. Most enquiries answered within 24 hours.

Talk to an expert →

sales@iaqdetectors.com · +91 8121025651 · Hyderabad, India