Radar & Infrared Safety Sensor for Automatic Door Control | M-235

Combined Radar Activation & Infrared Safety Sensor – Model M-235

Upgrade your automatic sliding, folding, or curved door system with this professional-grade Combined Radar Activation and Infrared Safety Sensor. Engineered for commercial and high-traffic entryways, this dual-technology sensor combines 24.125 GHz microwave motion detection for door activation with a reflective infrared safety curtain to keep the doorway clear during operation — delivering smooth, reliable, and safe automated door performance.

CE certified and Made in Mainland China.

Key Features

• Dual Technology Design: Microwave radar triggers door activation on approach, while the 8-beam infrared curtain monitors the doorway opening to prevent accidental closing on people or objects.
• Background Self-Learning: Automatically calibrates to its environment on power-up, then continuously self-corrects when affected by vibration, distortion, movement, low light, or direct sunlight — ensuring consistent, long-term reliability.
• German Microwave Sensor Module: The microwave activation system uses a precision German microwave module, engineered to deliver stable detection performance regardless of temperature or humidity fluctuations.
• Wide Detection Zone: Microwave radar covers a detection area of up to 4m (W) × 2m (D), ideal for wide commercial entrances.
• Fast Response: Infrared safety response time under 100ms with a 500ms output signal; microwave activation output of 0.5s — ensuring near-instant door control.
• LED Status Indicators: Blue LED signals standby mode; Red LED indicates active detection — making installation checks and troubleshooting straightforward.
• Broad Compatibility: Supports AC/DC 12–30V power supply with relay signal output, compatible with most standard automatic door controllers.
• Durable ABS Housing: Impact-resistant ABS cover with PMMA optical surface protects components in demanding environments.

Technical Specifications

General

• Model: M-235
• Certification: CE
• Power Supply: AC/DC 12–30V
• Cable Length: 2.5m
• Signal Output: Relay
• Max. Installation Height: 2,500mm
• Static Power: 65mA
• Action Current: 130mA
• Dimensions: 260.3L × 53.4W × 44H mm
• Housing Material: ABS

Infrared Safety Sensor

• Ray Type: Reflective Infrared
• Ray Source: Infrared 940nm
• Number of Rays: 8 emit + 8 receive
• Self-Learning Time: 10 seconds
• Operation Indicators: Blue LED (standby) / Red LED (active)
• Operating Temperature: -40°C to +60°C
• Output Time: 500ms
• Response Time: <100ms
• Optical Surface: PMMA

Microwave Activation

• Technology: Microwave Processor
• Frequency: 24.125 GHz
• Emission Power: <20dBm EIRP
• Transmission Frequency Density: <5mW/cm²
• Detection Mode: Movement
• Detection Range: 4m (W) × 2m (D)
• Output Time: 0.5s
• Operating Temperature: -20°C to +55°C

What's in the Box

• 1 × Combined Radar Activation & Infrared Safety Sensor (Model M-235)

Helpful Resources

For guidance on building safety standards and automated door system compliance, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What types of automatic doors is this combined radar and infrared sensor compatible with?

A: The M-235 combined sensor is designed for use with automatic sliding doors, folding doors, and curved doors. Its relay signal output makes it compatible with most standard automatic door control systems that accept a relay trigger signal and operate on AC/DC 12–30V power.

Q: How does the background self-learning feature work on this automatic door sensor?

A: When powered on, the sensor automatically scans and memorizes the surrounding environment as its baseline background within approximately 10 seconds. If conditions change due to vibration, structural shifts, varying light levels, or environmental movement, the sensor continuously self-corrects to prevent false triggering and maintain accurate detection over time.

Q: What is the maximum installation height for the M-235 infrared and radar door sensor?

A: The M-235 can be installed at a maximum height of 2,500mm (approximately 2.5 meters or just over 8 feet), making it suitable for standard commercial door frames and most retail or office entryways.

Q: Does the microwave radar module work in all weather and temperature conditions?

A: Yes. The microwave module — based on a German-engineered microwave sensor — is designed to operate reliably regardless of temperature or humidity changes. The microwave activation system functions within -20°C to +55°C, while the infrared safety sensor operates across a wider range of -40°C to +60°C, making the unit suitable for both indoor and sheltered outdoor installations.