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Cleanroom Control and Environmental Monitoring Systems
Door Status Sensor
A sealed magnetic proximity contact that reports the true open or closed position of a cleanroom door to interlock, pressure and monitoring systems.
- Non-Contact Magnetic Sensing
- Flush Cleanroom Installation
- Sealed Stainless Face
- Open-Closed Signal Output
Product Introduction
The cleanroom door status sensor uses a reed or solid-state magnetic element in the frame and a permanent magnet in the moving leaf. Because the two parts do not touch, the device avoids exposed mechanical levers and tolerates frequent door cycles. Flush stainless or smooth polymer housings sit nearly level with the door surfaces for easier wiping. Normally open, normally closed or changeover contacts provide a direct input to airlock interlocks, room pressure controls, alarms and access monitoring.
Key Features
Flush or low-profile bodies preserve smooth door and frame surfaces for routine cleaning.
Clearly matched sensor and magnet geometry provides repeatable switching distance.
Dry-contact or solid-state outputs connect directly to common PLC, DDC and interlock inputs.
Customer Product Concerns
Reliable door status depends on alignment, switching gap and cable protection rather than only the electrical contact type.
A door looks closed but the sensor remains open because the magnet is misaligned.Matched flush pockets and alignment marks position the magnet within the specified operating gap.
A protruding limit switch traps residue on the cleanroom frame.A flush non-contact sensor removes exposed actuator arms and horizontal ledges.
Repeated door movement breaks an unprotected cable at the frame.Fixed frame wiring and sealed rear entry keep the cable away from hinges and moving hardware.
The interlock cannot distinguish a cut cable from a closed door.Normally closed or supervised circuits allow open-circuit wiring faults to create a detectable abnormal state.
Typical Applications
Personnel airlock doorsMaterial-transfer airlock doorsCleanroom swing and sliding doorsPass box door monitoring
Technical Parameters
Typical materials and dimensions for a flush cleanroom magnetic door status sensor are shown below.
| Core Material | Reed or solid-state magnetic element in 304 stainless steel or glass-filled polymer body |
|---|---|
| Panel Thickness | 12-25 mm sensor body depth |
| Effective Width | 15-30 mm face width |
| Maximum Length | Up to 100 mm sensor body length |
| Steel Facing Thickness | 0.8-1.2 mm 304 stainless steel faceplate |
| Core Density | 7900-8030 kg/m³ for stainless face components |
| Thermal Conductivity | 14-17 W/(m·K) for 304 stainless steel face |
| Surface Finish | Brushed stainless steel or smooth white polymer with concealed fixing points |
| Joint Type | Paired recessed sensor and magnet with sealed pigtail or rear screw terminal |
| Customization | Available based on the intended application and operating environment. |
Available Options
Recessed or surface mountNormally open, closed or changeover contactArmored cable leadWide-gap magnet
Planning a Door Status Sensor specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
