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SDC MD-31D Series Request-to-Exit PIR Motion Sensors

SKU: MD-31DB
$ 193.90

SDC MD-31D Series Request-to-Exit PIR Motion Sensors

Passive Infrared Motion Sensors for Access Control and Egress

The SDC MD-31D Series Request-to-Exit (REX) PIR Motion Sensors are passive infrared motion detectors specifically designed for access-controlled door egress applications. Engineered to provide reliable motion detection and secure door release, these sensors are ideal for commercial buildings, institutional facilities, and other environments requiring code-compliant access control systems.

Featuring an internally pointable coverage field, the MD-31D provides flexible detection positioning to accommodate different mounting heights and installation requirements. Its unique wrap-around U-shaped detection pattern projects downward and away from the door, helping inhibit tampering and ensuring dependable request-to-exit activation.

The MD-31D Series incorporates a relock time delay (RTD), auto-sensing dual voltage, and a code-compliant failsafe mode for enhanced system integration and reliable operation. Designed for use with access-controlled egress doors, these PIR motion sensors comply with applicable national fire and building code requirements.

Standard Features

  • Passive infrared (PIR) motion detection technology

  • Specifically designed for Request-to-Exit (REX) applications

  • Internally pointable detection coverage field

  • Wrap-around U-shaped detection pattern for enhanced tamper resistance

  • Relock time delay (RTD)

  • Flexible mounting options: door frame header, wall, or ceiling

  • Code-compliant failsafe operating mode

  • Auto-sensing dual voltage

  • Designed for access-controlled egress doors

  • Complies with applicable NFPA fire and building code requirements

Detection Coverage

The SDC MD-31D Series features an adjustable detection field designed to provide reliable motion sensing near controlled doors.

  • At 7 feet mounting height with a 14-degree downward angle: approximately 5' x 6' coverage

  • At 15 feet mounting height with a 14-degree downward angle: approximately 10' x 12' coverage

The internally adjustable sensor allows installers to position the detection pattern for optimal coverage while helping prevent unwanted activation or tampering.

Available Models

SDC MD-31DOW – PIR Motion Sensor, White

  • Passive infrared Request-to-Exit sensor

  • White housing finish

  • Ideal for installations requiring a light-colored sensor

SDC MD-31DB – PIR Motion Sensor, Black

  • Passive infrared Request-to-Exit sensor

  • Black housing finish

  • Ideal for installations requiring a dark-colored sensor

Code Compliance

The SDC MD-31D Series is designed to comply with applicable access-controlled egress door requirements, including:

  • IBC International Building Code – 1008.1.3.4

  • IFC International Fire Code – 1008.1.3.4

  • NFPA 101 Life Safety Code – 7.2.1.6.2

  • NFPA 1 – 15.5.3.2

  • BOCA National Building Code – 1017.4.5

  • SBCCI Standard Building Code – 1012.7

Applications

The SDC MD-31D Series PIR Motion Sensors are ideal for:

  • Commercial building access control systems

  • Request-to-Exit (REX) applications

  • Access-controlled egress doors

  • Electromagnetic lock release systems

  • Electric strike and electronic locking applications

  • Institutional and healthcare facilities

  • Office buildings and industrial environments

  • NFPA-compliant egress installations

Reliable and Code-Compliant Request-to-Exit Detection

Enhance your access control system with the SDC MD-31D Series PIR Motion Sensors. Combining passive infrared detection, adjustable coverage, tamper-resistant sensing patterns, and code-compliant failsafe operation, the MD-31D provides a dependable solution for secure and efficient door egress.
DESCRIPTION TAG: Shop SDC MD-31DOW White and MD-31DB Black Request-to-Exit Motion Sensors at US Lock Supply for professional access control and commercial door security solutions.