Description

1. What the WB-4001B does

• 24 GHz planar antenna, 4 × 2 m field, 0.2 km/h minimum speed
• NPN + PNP outputs, 100 mA, short-circuit protected
• 24 Vdc ±10 % supply, 35 mA consumption, reverse polarity protected
• IP65 polycarbonate housing, -25 °C to +70 °C operating range
• SIL-2 safe outputs and EN 16005 certified for 10-year design life

2. Tools to carry

• WB-4001B sensor (Nanjing Zhuye part #WB-4001B-24G) in IP65 box with bracket
• 2.5 mm & 3 mm flat screwdrivers, 10 mm open wrench
• Hand-held service tool (optional for field tuning)
• Multimeter with 24 Vdc range
• IPA wipes and lint-free cloth
• Feeler gauges 0.1–1.0 mm
• Lock-out / tag-out kit

3. Installation – 15 minutes if you mark the zone
   Safety: place the door on manual, open the controller disconnect and verify 0 V on the 24 Vdc rail.

1. Mark the detection zone on floor with masking tape – 4 m wide × 2 m deep.
2. Mount bracket on door header, 2.2 m above finished floor, tilt 5° downward.
3. Connect 24 Vdc supply (brown +, blue -) and outputs (black NPN, white PNP).
4. Apply power – green LED blinks twice then solid; amber LED flashes when motion detected.
5. Walk-test: approach at 0.2 km/h; door must start opening at 1.5 m from threshold.
6. Adjust potentiometer for range and sensitivity; lock settings with thread-locker.
7. Cycle the door 5 times; verify no dead spots or false triggers.
8. Record serial number, date and range values in CMMS.

4. Functional test – prove it to the inspector
   a) Detection field: 4 × 2 m, no dead spots at 0.2 km/h.
   b) Response time: <100 ms between motion and output change.
   c) Supply current: 35 mA ±2 mA at 24 Vdc.
   d) LED status: green steady, amber flashes on motion, red on fault.
   e) Export walk-test report and attach PDF to site file.
5. Preventive maintenance schedule

• Monthly – visual sweep for dust on lens or spider webs.
• Quarterly – measure 24 Vdc ripple (<1 V) and response time (<100 ms).
• Annually – clean antenna with IPA; re-check detection field after floor polishing.
• Every two years – replace the polycarbonate window – micro-scatters reduce range.

6. Replacement cycle – traffic and environment decide
   Manufacturer specification: 10 years. Nanjing Zhuye analytics refine this:

• Light traffic (<50 cycles/h, office): 12 years
• Standard traffic (50–150 cycles/h, retail): 10 years
• Heavy traffic (>150 cycles/h, hospital): 8 years
• High dust (parking, workshop) or chemical fumes: 6 years – antenna window clouds.

• Detection range drops >30 % – antenna window etched
• Response time >200 ms – internal oscillator ageing
• LED red steady – CPU or output transistor failure
• Supply current >60 mA – internal short circuit

7. Eco-disposal & warranty
   Return the old sensor in the recycling box; Nanjing Zhuye recovers polycarbonate, copper and gold and issues a €5 recycling credit. Every WB-4001B ships with a 24-month replacement warranty, extendable to 60 months when you join our annual lens-cleaning program.
8. Why buy from Nanjing Zhuye Elevator Parts

• 500 units in stock, Rotterdam & Nanjing, ready for same-day courier
• Factory-sealed packaging with hologram – no grey-market clones
• QR code on box links to 3-minute tuning video and walk-test sheet
• 24/7 technical hotline staffed by ex-automation engineers
• Bundle pricing: buy 5 sensors and get a free spare lens plus freight credit

9. Bottom line
   A dirty or drifting sensor is the fastest way to a door service call. Keep a genuine WB-4001B in every van, mount and tune it in 15 minutes, and your sliding doors will stay safe, hygienic and compliant for the full 10-year design cycle. Order today from Nanjing Zhuye Elevator Parts – the fastest route from “sensor fault” to “perfect pass.”