Cleanroom Testing and Validation Instruments

Cleanroom Door Leakage Tester

A portable cleanroom door leakage tester for applying a controlled pressure difference to a defined door-seal test boundary while recording differential pressure, airflow and calculated leak rate.

Controlled differential-pressure testing.
Synchronized airflow and leak-rate display.
Portable localized door-seal interface.

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Product Introduction

This field system combines regulated airflow, dual-channel pressure referencing and a foldable local seal interface in one portable kit. The rectangular hood or narrow-gap attachment is temporarily sealed over a defined section of the closed door perimeter, while two color-coded pressure tubes reference opposite sides of the test boundary. The operator adjusts the single airflow path until the specified differential pressure is stable, then records the flow required to maintain that condition and, where applicable, normalizes the result by the entered test length or area. The instrument supports comparative commissioning and troubleshooting measurements; it does not automatically certify an entire cleanroom door, adjacent wall or room envelope. Test pressure, boundary preparation, allowable leakage, environmental state and result interpretation remain controlled by the approved method.

Key Features

Single display presents differential pressure, measured airflow and calculated leak rate together so the operating point can be reviewed without separate instruments.

Six-key local interface supports target entry, zeroing, stabilization timing, data capture and result recall with a fixed physical control layout.

One fine pressure-adjustment knob and one visible flowmeter provide direct feedback while the selected pressure condition is established.

Red and blue pressure tubes keep the two pressure-reference sides identifiable from the instrument ports to their endpoint probes.

One flexible main hose connects the airflow source to a foldable rectangular seal hood for localized door-edge or gasket testing without depicting a full test chamber.

Rugged blue-gray enclosure, top carry handle and four stable feet support temporary cleanroom commissioning and maintenance work.

Customer Product Concerns

Door leakage measurements are sensitive to the temporary test boundary, pressure-reference position, HVAC stability, tested perimeter length and flowmeter range; controlling these variables is essential before two results can be compared.

Air escaping through the temporary hood seal can be mistaken for leakage through the door gasket.Clean the contact surface, use the correct seal-frame size, secure the perimeter uniformly and perform the defined blank or attachment-leak check before measuring the door segment.

Normal HVAC pressure fluctuation can prevent a stable differential-pressure reading.Test in the specified room state, allow the pressure cascade to settle, route both reference tubes away from drafts and use an agreed stabilization window before logging flow.

A test may be recorded before the target pressure is reached or while the regulator is still changing.Approach the target gradually with the single adjustment knob, verify the pressure and flow trend together, and capture data only after both values meet the stability rule.

Leak rates from different doors can be compared even though the tested length or area is different.Record the exact hood boundary and exposed seal length, apply the same normalization basis and compare only results obtained at the same specified pressure difference.

A localized door-edge result can be interpreted as proof of whole-room airtightness.Identify the tested segment in the record and combine local findings with the separate room-envelope or door-assembly method required by the approved test plan.

Very low or high leakage can fall outside the installed flowmeter range.Select the appropriate flow range or calibrated nozzle option, verify zero and tubing connections, and repeat the test within the instrument's usable operating window.

Typical Applications

Comparative leakage checks along cleanroom door gaskets and threshold sealsCommissioning support after cleanroom door installation or adjustmentVerification after gasket replacement, hinge alignment or closer maintenanceInvestigation of pressure-cascade instability near personnel or material doorsLocalized leakage surveys of door-frame joints and controlled-environment panels

Technical Parameters

The representative system below uses one regulated airflow hose, two color-coded pressure references and a foldable local seal interface. Final pressure setpoint, flow range, hood dimensions, stabilization time, tested length and allowable leakage should be selected for the approved door or enclosure test procedure.

Core Material	Powder-coated aluminum main chassis with PC/ABS blue-gray protective trim, clear flow tube, polyurethane differential-pressure tubing, flexible main hose and coated-fabric folding seal hood
Panel Thickness	Typically 2.0-3.0 mm for the portable enclosure panels and protective trim sections
Effective Width	Approximately 360-480 mm across the main leakage-test unit, excluding hoses and the folded door-seal attachment
Maximum Length	Approximately 900-1300 mm for the complete arranged kit including the main hose, two pressure tubes and deployed local seal frame
Steel Facing Thickness	Typically 1.0-1.5 mm for stainless connector plates, pressure probes, hose collars and interface hardware
Core Density	Approximately 2700 kg/m³ for the aluminum structural chassis sections
Thermal Conductivity	Approximately 160-205 W/(m·K) for the aluminum chassis alloy
Surface Finish	Satin blue-gray enclosure with dark-navy corner protection, blue-white display, charcoal keys and knob, clear flowmeter, red and blue pressure tubes, black main hose and light-gray folding seal hood
Joint Type	One regulated large-hose airflow outlet to a foldable rectangular local seal attachment, plus two separate barbed differential-pressure ports for the red and blue reference tubes
Customization	Available based on the intended application and operating environment.

Available Options

Alternative narrow-gap nozzles and rectangular seal-frame dimensionsLow-flow and extended-flow measurement modulesLonger red and blue differential-pressure tube sets with stainless probesFlexible black main-hose lengths and quick-lock couplingsRechargeable battery pack and protected transport caseUSB or wireless time-series data exportConfigurable test-length, area and pressure-normalization fields

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