MS Sedco DH-400 FRM-AI Combina...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$414.00
$282.79
MS Sedco MS Sedco DH-400 FRM-AI Combination Motion & Presence Sensor MSS-DH-400

MS Sedco DH-400 FRM-AI Combination Motion & Presence Sensor for Automatic Doors

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Model: DH-400

In Stock (leaves warehouse same day if ordered before 3pm ET)

$414.00
$282.79
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MS Sedco DH-400 FRM-AI Combination Motion & Presence Sensor for Automatic Doors

The MS Sedco DH-400 is a high-mount active infrared (AI) combination motion and presence sensor engineered to deliver safety protection for automatic swinging, sliding, and folding doors. Utilizing Floor Reflection Method Active Infrared (FRM-AI) technology, the DH-400 projects up to 60 individual detection zones precisely reflected off the floor in a rectangular pattern, meeting and exceeding ANSI A156.10 guidelines. The sensor provides detection coverage as far as 13.1 feet (4m) from the door while simultaneously maintaining a dense presence detection zone at the door threshold, and can be mounted at heights up to 13.1' (4m). With a fully adjustable detection pattern width and depth, the DH-400 delivers the highest density sensing pattern available for commercial automatic door applications.

Key Features

  • FRM-AI Technology: Floor Reflection Method Active Infrared (FRM-AI) detection uses up to 60 individual floor-reflected detection zones arranged in a precise rectangular pattern for maximum coverage reliability.
  • Extended Detection Range: Provides motion detection as far as 13.1 feet (4m) from the door, enabling early activation and enhanced safety for approaching users.
  • High-Density Presence Detection: 60 separate detection zones create the highest density sensing pattern available, ensuring continuous presence detection at the door threshold.
  • High-Mount Capability: Designed for overhead mounting at heights up to 13.1' (4m), accommodating a wide range of door frame and header configurations.
  • Fully Adjustable Detection Pattern: Width and depth of the detection pattern are fully adjustable, allowing precise customization to match specific door opening dimensions and traffic flow requirements.
  • Automatic Door Compatibility: Engineered specifically for safety protection on automatic swinging, sliding, and folding door systems in commercial environments.
  • ANSI A156.10 Compliance: Detection pattern meets and exceeds ANSI A156.10 guidelines, ensuring code-compliant performance for automatic door safety applications.
  • Easy Installation & Adjustment: Designed for straightforward installation and on-site adjustment, reducing setup time and simplifying field configuration.

Certifications & Compliance

  • Meets and Exceeds ANSI A156.10 Guidelines
  • Commercial Grade

Technical Specifications

  • Type: Active infrared presence sensor
  • Function: Safety only - not monitoring capable
  • Application: Pedestrian automatic doors

Typical Applications

  • Commercial Office Building Automatic Entrances
  • Healthcare Facility Automatic Sliding and Swinging Doors
  • Retail Storefront Automatic Door Systems
  • Educational Institution Entry and Corridor Doors
  • Hospitality and Hotel Lobby Automatic Entrances
  • Industrial and Warehouse Facility Access Points
  • Government and Municipal Building Automatic Door Safety Systems

Why MS Sedco DH-400?

The MS Sedco DH-400 stands apart through its advanced FRM-AI technology, delivering up to 60 precisely reflected floor detection zones that form the highest density sensing pattern available for automatic door safety. Engineered to meet and exceed ANSI A156.10 guidelines with a fully adjustable detection pattern and mounting heights up to 13.1' (4m), the DH-400 provides commercial-grade reliability for demanding automatic door environments where consistent, code-compliant safety performance is essential.

Manufacturer Resources

DH400 Installation Instruction

Product Specs

Product Group:
Electronic Access Controls
Series:
DH-400
Product Subgroup:
Sensors, Switches, Relays and Timers
Product Type:
Motion Sensors
Subcategory:
Combination Motion & Presence Sensor
Commercial/Residential:
Commercial
Electronic:
Yes
Product Model:
DH-400
Product Category:
Electronic Access Controls
Department:
Door Hardware

MS Sedco DH-400 – Frequently Asked Questions

1) Will the MS Sedco DH-400 sensor work as the safety sensor on an automatic sliding door, or is it only for swing doors?
Swinging, sliding, and folding automatic pedestrian doors are all covered by the DH-400. It's a high-mount active infrared combination motion and presence sensor, so it handles both the approach detection and the presence hold at the threshold on any of those three door types.
2) How high can the DH-400 door sensor be mounted on the header?
Up to 13.1 feet (4m). That's a high-mount sensor by design, so tall storefront headers, recessed transoms, and high lobby entrances are within range. Detection also reaches as far as 13.1 feet (4m) out from the door, so approach activation starts well before the user reaches the threshold.
3) Can the DH-400 be used as the request-to-exit device for an access control system?
No. The DH-400 is a safety sensor for automatic door operators, not an REX. If you need a motion sensor to shunt an alarm and release an electric lock on egress, look at a request-to-exit detector like the Bosch DS160 PIR request to exit detector, the Securitron XMS request to exit motion sensor, or the Camden CM-RQE70 series. Those are built for the access control side; the DH-400 is built to keep an automatic door from closing on someone.
4) Does the DH-400 sensor meet ANSI A156.10 for automatic door safety?
The detection pattern meets and exceeds ANSI A156.10 guidelines. For a facility inspector or a spec on a drawing calling for A156.10 compliant sensing on a powered pedestrian door, the DH-400 answers it. One caveat worth knowing before you write it into a submittal: the DH-400 is a safety-only sensor and is not monitoring capable, so if the operator requires a self-monitored sensor, this is not that device.
5) What is the difference between the MS Sedco DH-400 and a request-to-exit sensor like the Securitron XMS or Bosch DS160?
They solve two different problems on an opening. The MS Sedco DH-400 is a combination motion and presence sensor for automatic swinging, sliding, and folding doors, using Floor Reflection Method Active Infrared with up to 60 floor-reflected detection zones to provide safety detection at the threshold and out to 13.1 feet from the door, meeting ANSI A156.10. The Securitron XMS is a request to exit motion sensor, and the Bosch DS160 is a PIR request to exit detector with a sounder. A request-to-exit device signals an access control system to release a lock when someone approaches from the secure side; it does not provide the threshold presence detection an automatic door operator needs to hold the door safe. If the opening is a powered pedestrian door, the DH-400 is the sensor class; if the opening is a locked door on an access control system, the XMS or DS160 is.
6) I need a motion sensor to release a maglock when someone walks up to the door from inside. Is the DH-400 the right part?
No. The MS Sedco DH-400 is a safety-only sensor for pedestrian automatic doors and is not monitoring capable, so it is not built to serve as the egress release device on a locked opening. For that, the Alarm Controls SREX-100 is an infrared motion sensor for request to exit with an adjustable time delay, the Camden CM-RQE70 series are adjustable infrared request-to-exit motion sensors operating on 12 to 24V with a white or black housing, and the Locknetics EMS-100 is an exit motion sensor supplied with ceiling and surface mount adapters. Choose among those by the mounting condition and the voltage available at the header.
7) Can a passive infrared sensor such as the Detex MN01 be used in place of the DH-400 for automatic door safety?
They detect differently and are aimed at different jobs. The Detex MN01 and MN02 series are passive infrared motion sensors using dual-pyroelectric detection, which responds to a moving heat signature. The MS Sedco DH-400 uses Floor Reflection Method Active Infrared, projecting up to 60 individual detection zones off the floor in a rectangular pattern, which holds detection on a person standing still in the threshold as well as one approaching. That standing presence coverage is what an automatic door operator relies on to keep the door from closing on someone, and it is why the DH-400 pattern is stated to meet and exceed ANSI A156.10. For a powered swinging, sliding, or folding door, specify the DH-400 rather than a passive infrared unit.
8) What does FRM-AI mean on the MS Sedco DH-400 and why does it matter for door safety?
FRM-AI is Floor Reflection Method Active Infrared. Instead of watching for heat movement, the sensor projects infrared beams down and reads them back off the floor, in up to 60 individual zones laid out in a rectangular pattern. Two practical consequences: it holds a standing person at the threshold (a passive infrared sensor loses someone who stops moving), and the 60 zones give a dense pattern with fewer gaps a small child or a cart wheel can sit in.
9) Can the detection pattern on the DH-400 be adjusted to fit a narrow doorway?
Both width and depth of the pattern are fully adjustable in the field, so the rectangle can be narrowed to a single leaf or widened across a broad entrance, and the depth trimmed back where traffic passes parallel to the door and would otherwise false-activate it. Adjustment is done on site at install.
10) Do I need one DH-400 or two for a pair of automatic doors?
Coverage is what decides it, not the leaf count. A single DH-400 throws one adjustable rectangular pattern reaching up to 13.1 feet from the door, so if that pattern can be widened to cover the full clear opening from one header position, one sensor does it. Wider openings, or biparting sliders where each side swings or slides into its own path, typically get a sensor per side so each leaf's threshold stays inside a dense presence zone. Lay it out against your actual opening width before you order.
11) What is the difference between the DH-400 and a passive infrared motion sensor like the Detex MN01?
Different jobs. The DH-400 is an active infrared safety and presence sensor for automatic door operators, projecting up to 60 floor-reflected zones so it keeps detecting a person who has stopped moving in the doorway. The Detex MN01 and MN02 are passive infrared motion sensors, which sense movement rather than presence, and Detex's line is aimed at the exit and egress side rather than automatic door safety. If the requirement is holding an auto operator open around a standing person, passive infrared is the wrong tool.
12) The header on my automatic entrance is about 12 feet up. Which sensor mounts that high?
The MS Sedco DH-400 is a high-mount sensor designed for overhead mounting at heights up to 13.1 feet (4m), with a fully adjustable detection pattern width and depth so the floor pattern can be sized to the opening from that height. The comparable exit sensors are specified by their mounting style rather than a high-mount rating; the Locknetics EMS-100, for instance, is supplied with ceiling and surface mount adapters for typical door-header and ceiling positions. For a 12-foot header on a powered entrance, the DH-400 is the unit in the group rated for that mounting height.
13) Our access control spec calls for a monitored exit device. Does the DH-400 meet that?
No. The MS Sedco DH-400 is a safety-only sensor and is not monitoring capable, so it should not be written into an access control sequence that requires a monitored or supervised exit signal. Look instead to the request-to-exit family: the Bosch DS150i series request-to-exit detectors, the Bosch DS160 PIR request to exit detector with sounder, or the Securitron XMS request to exit motion sensor. The DS160's sounder is the differentiator if the facility wants an audible annunciation at the door on release.
14) I have both an automatic sliding entrance and a card-reader stairwell door in the same building. Do I need two different sensors?
Yes, and they are not interchangeable. The automatic sliding entrance takes the MS Sedco DH-400, a combination motion and presence sensor for automatic swinging, sliding, and folding doors whose 60-zone floor-reflected pattern is stated to meet and exceed ANSI A156.10 for automatic door safety. The card-reader door takes a request-to-exit sensor: the Camden CM-RQE70 series adjustable infrared units run on 12 to 24V and come in a white or black housing to match the frame, and the Alarm Controls SREX-100 offers an adjustable time delay for tuning how long the lock stays released. Standardizing across a facility works within each of those two groups, not across them.
15) Is the DH-400 sensor rated for commercial traffic, or is it a residential product?
Commercial grade. MS Sedco lists it for office building entrances, healthcare sliding and swinging doors, retail storefronts, schools, hotel lobbies, warehouses, and government buildings. It is not a residential device.
16) Is there an installation manual for the MS Sedco DH-400?
Yes, MS Sedco publishes installation instructions for the DH-400, and ZenSupply hosts the PDF with the product so the installer can pull mounting and adjustment detail before going to site. Worth reading first, since pattern width and depth are set at the sensor during install rather than preset at the factory.
How fast can I get the MS Sedco DH-400 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the MS Sedco DH-400 come with a warranty?
Absolutely. The MS Sedco DH-400 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the MS Sedco DH-400?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the MS Sedco DH-400 from ZenSupply?
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