24.125GHz Microwave Motion Sensor for Automatic Doors & Access Control 12V-24V - Silver

A high-sensitivity radar motion probe in an elegant metallic silver finish, operating at 24.125 GHz with an integrated microprocessor. Engineered for automatic sliding door activation, revolving doors, and access control security systems, it detects human movement starting from an ultra-slow speed of 5 cm/s with a steady 1.5-second signal hold to ensure safe and continuous passage. The unit supports versatile dual-power input (12V–24V AC/DC) with a voltage-free dry contact relay output (COM/NO) and features a compact 118×79×50 mm flame-retardant ABS housing with a 2.2m connection cable designed to match modern silver aluminum entryways.

Product Features:

• Advanced 24.125GHz microwave radar technology with onboard microprocessor for fast response.
• Premium metallic silver finish matching architectural aluminum frames and glass storefronts.
• High detection sensitivity capable of tracking slow movements down to 5 cm/s.
• Adjustable internal antenna supporting both vertical tilt and horizontal rotation.
• Flexible power input supporting 12V to 24V (AC/DC).
• Dry contact relay output (COM/NO) handling up to 42V at 1A with a 1.5-second signal hold time.
• Built-in potentiometer for smooth sensitivity and range calibration.
• Flame-retardant ABS engineering plastic housing with an included 2.2m cable.

💡 Technology (Simply Explained):

The sensor operates on active microwave radar principles using a high-frequency 24.125 GHz transmitting and receiving antenna combined with digital signal processing. Movement within the coverage area creates a Doppler frequency shift in the reflected radar waves; the microprocessor processes this signal and activates the output relay for a stable 1.5-second hold time, ensuring smooth door opening without erratic stuttering.

Orientation & Coverage:

Provides full flexibility to align the radar beam with the entryway layout. The antenna tilts vertically to configure forward detection depth for mounting heights up to 3.5 meters and rotates horizontally to focus coverage directly on the primary entrance path, effectively ignoring lateral pedestrian traffic.

Compatibility:

Fully compatible with all automatic sliding, swing, and revolving door control boards, security access gates, and alarm systems requiring voltage-free dry contact trigger inputs (Normally Open - NO).

Load & Power Limits:

Engineered strictly for control signal triggering. The internal relay output handles up to 42V (AC/DC) at 1A maximum. Direct connection to 220V mains electricity or driving heavy door motors directly through the sensor terminals is strictly prohibited; it must interface only with the controller's trigger input.

Practical Applications & Use Cases:

Ideal for commercial automatic doors in shopping malls, modern office lobbies, smart residential entries, and pharmacies with silver architectural frames, as well as security access control and passage alarm triggers.

Automation & Logic Sequences:

Integrates seamlessly into access control setups. Detecting an approaching person triggers the door opening signal and can simultaneously activate entrance lighting or audio greetings, keeping the door open throughout the 1.5-second hold period before initiating a timed close sequence.

Technical Specifications:

• Transmission Frequency: 24.125 GHz Microwave
• Internal Processing: Microprocessor
• Supply Voltage: AC/DC 12V - 24V (Supports DC up to 27V)
• Output Type: Voltage-free Dry Contact Relay (Signal Hold 1.5S)
• Max Contact Voltage: 42V AC/DC
• Max Contact Current: 1A
• Min Detection Speed: 5 cm/s
• Max Installation Height: 3.5m
• Included Cable Length: 2.2m

Physical Specifications:

• Dimensions: 118mm (W) × 79mm (H) × 50mm (D)
• Housing Material: Flame-retardant ABS engineering plastic
• Housing Color: Metallic Silver
• Interface Port: 4-pin JST plug-and-play connector
• Status Indicator: Integrated LED for power and detection status

Package Contents:

• 24.125GHz Microwave Radar Motion Sensor in Silver.
• 2.2-meter connection cable with JST connector.
• Surface mounting screw set.
• User manual and technical wiring guide.

Frequently Asked Questions (FAQs):

What is the purpose of the 1.5-second signal hold feature?

It maintains the relay trigger state for 1.5 seconds upon motion detection, providing ample time for the door mechanism to initiate a smooth opening motion without stuttering.

How do I adjust the detection sensitivity and range?

Rotate the internal Range potentiometer clockwise to increase sensitivity and distance, or counter-clockwise to reduce them.

How are the 4 connection wires identified?

The green and brown wires connect to the power supply (12V-24V AC/DC), while the white and yellow wires connect to the dry contact signal terminals (COM and NO) on the door control board.

Keywords:

Microwave Sensor, Silver Radar Sensor, Automatic Door Opener, Access Control Probe, 24GHz Sensor, 12V 24V Sensor, Abhir

Installation & Wiring:

1. Open the outer housing and secure the base plate onto the transom or wall above the entrance at a height up to 3.5m.
2. Plug the 4-pin JST connector into the rear port and route the 2.2m cable:

• Green & Brown wires: Power supply lines (12V-24V AC/DC).
• White & Yellow wires: Dry contact relay leads (COM & NO) to the door controller trigger input.

1. Adjust the vertical tilt and horizontal rotation of the antenna, then turn the sensitivity potentiometer (Range) to fit the entryway dimensions.
2. Snap the silver front cover back in place, apply power, and test the door response upon walking into the detection field.

⚠️ Safety Precautions:

1. Disconnect main power before wiring or handling terminal leads.
2. Ensure input voltage is within the safe 12V-24V range; do not connect directly to 220V mains power.
3. Do not exceed the maximum contact rating (42V / 1A) to preserve the internal relay switch.

Complete Your Setup (Frequently Bought Together):

Helpful Resources & Videos:

🔄 Cancellations, Returns & Exchanges

Abhir Online is committed to a clear and fair policy that safeguards and outlines the rights of both the customer and the store. To streamline your experience, please read the terms of our Cancellation, Return and Exchange Policy and our Policies and Customer Rights Page. You can find them at the bottom of the homepage, and they will also appear on the Checkout Page. 🤝

Installation & Wiring:

1. Open the outer housing and secure the base plate onto the transom or wall above the entrance at a height up to 3.5m.
2. Plug the 4-pin JST connector into the rear port and route the 2.2m cable:

• Green & Brown wires: Power supply lines (12V-24V AC/DC).
• White & Yellow wires: Dry contact relay leads (COM & NO) to the door controller trigger input.

1. Adjust the vertical tilt and horizontal rotation of the antenna, then turn the sensitivity potentiometer (Range) to fit the entryway dimensions.
2. Snap the silver front cover back in place, apply power, and test the door response upon walking into the detection field.