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Cleanroom Control and Environmental Monitoring Systems
Filter Differential Pressure Sensor
A differential sensor package that compares upstream and downstream filter pressure to track loading, blockage and unexpected bypass conditions.
- Upstream-Downstream Comparison
- Filter Loading Trend
- Adjustable Alarm Threshold
- Dual Pressure Tubing Kit
Product Introduction
The filter differential pressure sensor receives one pressure line from each side of a HEPA filter, prefilter or air-handling coil. Its low-pressure element converts the difference into a continuous signal that rises as resistance builds at a given airflow. Monitoring systems can trend the value and generate a maintenance alarm before the filter causes excessive fan demand or airflow loss. Clearly separated high and low ports, colored tubing and serviceable zero adjustment reduce common installation errors.
Key Features
Continuous output shows the rate of loading instead of only a single switch point.
Adjustable alarm and hysteresis support planned maintenance before severe restriction.
Colored pressure lines and labeled ports reduce upstream-downstream connection errors.
Customer Product Concerns
Filter pressure drop depends on airflow as well as loading, so reliable interpretation requires correct pressure connections and trend context.
Maintenance changes filters on a fixed schedule without knowing actual loading.Continuous differential trends reveal how resistance develops under real operation.
Reversed pressure tubes produce a negative or misleading reading.Red-blue tubing and marked high-low ports preserve upstream-downstream orientation.
A brief fan-speed change triggers a false dirty-filter alarm.Delay and hysteresis prevent a short airflow transition from being treated as sustained loading.
A damaged or missing filter creates an unexpectedly low pressure drop.Low-differential alarms can identify probable bypass or absent media as well as high loading.
Typical Applications
HEPA terminal filtersAHU prefiltersBag-filter banksCleanroom return-air filters
Technical Parameters
Typical construction for a filter differential pressure sensor and tubing kit is listed below.
| Core Material | Silicon MEMS differential element in polycarbonate housing with stainless pressure taps and silicone tubing |
|---|---|
| Panel Thickness | 45-80 mm sensor depth |
| Effective Width | 90-150 mm transmitter width |
| Maximum Length | Pressure tubing supplied up to 3000 mm per side |
| Steel Facing Thickness | 0.5-0.8 mm stainless steel pressure taps |
| Core Density | 1180-1450 kg/m³ for polymer sensor housing |
| Thermal Conductivity | 0.19-0.35 W/(m·K) for polymer enclosure material |
| Surface Finish | Light-gray sensor housing with red-blue port markings and satin stainless taps |
| Joint Type | Dual barbed high-low ports with gasketed duct taps and removable signal terminal |
| Customization | Available based on the intended application and operating environment. |
Available Options
Analog output or pressure switchLocal LCDHigh and low alarm relaysColored tubing and duct tap kit
Planning a Filter Differential Pressure Sensor specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
