At a glance
- Mounting Height
- Max. 4.0 m
- Detection Field
- Narrow 0.7 x 0.6 to 2.7 x 1.9 m
- Supply Voltage
- 12 to 36 V DC / 12 to 28 V AC, 50 Hz
- Output
- Potential-free changeover contact
- IP Rating
- IP54 (EN 60529)
- Relay Contact Rating
- 48 V AC/DC, max. 0.5 A AC / 1 A DC, max. 60 VA / 30 W
Bircher Merkur 2 Radar Motion Sensor with Direction Recognition
Price on request
At a glance
- Mounting Height
- Max. 4.0 m
- Detection Field
- Narrow 0.7 x 0.6 to 2.7 x 1.9 m
- Supply Voltage
- 12 to 36 V DC / 12 to 28 V AC, 50 Hz
- Output
- Potential-free changeover contact
- IP Rating
- IP54 (EN 60529)
- Relay Contact Rating
- 48 V AC/DC, max. 0.5 A AC / 1 A DC, max. 60 VA / 30 W
Radar sensor that opens sliding, swing or revolving doors, inside or outside, for people approaching or leaving and lets them close straight after. 24 GHz dual field, direction recognition, detects slow movement below 5 cm/s, mounts up to 4 m.
Plug-in Screw Terminal, RJ12 Socket
Include the required quantity and configuration in your quote request. Price and availability will be confirmed in the quotation.
- WarrantyManufacturer warranty under Bircher's terms. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
What it is
Merkur 2 is a microwave (radar) motion detector with an electronically switched dual field planar module at 24.125 GHz. The ES and ES.C versions add direction recognition, so the door opens only for people approaching or leaving and closes again straight after.
What it is used for
Bircher describes Merkur 2 as usable on almost any automatic door, inside or outside. Brochure examples cover sliding doors on pavements, revolving doors (with a semicircular adapter), swing doors in tight spaces and homes for elderly and disabled people.
Key features
- Wide field up to 4.7 x 1.7 m or narrow field up to 2.7 x 1.9 m at 2.2 m, switched electronically
- SMD+ (slow motion detection) field that reacts to movement below 5 cm/s
- Direction recognition that can be switched off, plus cross-traffic suppression
- Setup by push buttons on the sensor or by the RegloBeam 2 remote control
- Potential-free changeover relay rated 48 V AC/DC, 0.5 A AC / 1 A DC
Buying considerations
The two versions differ only in connection: Merkur 2 ES has a plug-in screw terminal, Merkur 2 ES.C has an RJ12 socket. Pick the one that matches the door controller cable. The remote control is ordered separately.
Installation considerations
Maximum mounting height is 4 m, with a high mounting height setting for 3 to 4 m. The housing is IP54. Accessories include the MIS ceiling installation kit, MCAP rain and snow cover and MCL semicircular adapters for revolving doors of 2.0 to 6.0 m diameter.
Compatibility
Supply 12 to 36 V DC or 12 to 28 V AC, about 50 mA at 24 V DC. The changeover contact connects to standard activation inputs on door operators.
Features

In use
Bircher describes Merkur 2 as usable on almost any automatic door, inside or outside. Brochure examples cover sliding doors on pavements, revolving doors (with a semicircular adapter), swing doors in tight spaces and homes for elderly and disabled people.

Ports and connections
- Output
- Potential-free changeover contact
Technical specifications
Key facts
- What is it?
- Door Activation & Safety SensorsBrand Bircher, model Merkur 2 ES / ES.C
- What is it used for?
- Activation of automatic pedestrian doors
- How is it powered?
- 12 to 36 V DC / 12 to 28 V AC, 50 Hz
- Can it be used outdoors?
- IP54Indoor/Outdoor
- Which documents are available?
- User manual, quick start guide, brochure, certificate Open documents
- Can SecurityGearHub help with installation?
- Setup guidanceManuals, wiring guides and answers to setup questions. On-site work is arranged separately where available. Ask about installation
- Not stated by the manufacturer
- box contents
General
- Technology
- Microwave radar, dual field planar module, 24.125 GHz, transmit power < 20 dBm
- Application
- Activation of automatic pedestrian doors
- Door Type
- Sliding, swing and revolving doors
- Detection Field
- Narrow 0.7 x 0.6 to 2.7 x 1.9 m; wide 1.1 x 0.6 to 4.7 x 1.7 m (W x D at 2.2 m); min. detection speed 5 cm/s, below 5 cm/s with SMD+
- Relay Contact Rating
- 48 V AC/DC, max. 0.5 A AC / 1 A DC, max. 60 VA / 30 W
- Cable Length
- 3 m
- Configuration
- Push buttons or RegloBeam 2 remote control
- Output
- Potential-free changeover contact
Input
- Supply Voltage
- 12 to 36 V DC / 12 to 28 V AC, 50 Hz
- Power Consumption
- Approx. 50 mA at 24 V DC
Environment
- IP Rating
- IP54 (EN 60529)
- Operating Temperature
- -20 to +60 °C
Physical
- Mounting Height
- Max. 4.0 m
- Housing Material
- Cover PC, base plate ABS
- Dimensions
- 176 x 62 x 52 mm
- Weight
- 150 g without cable
Approvals
- Standards
- EN 61000-6-1, EN 61000-6-2, EN 61000-6-3, EN 61000-6-4
- Warranty
- Manufacturer warranty under Bircher's terms. How claims work
Product attributes and shipping details
| Brand | Bircher |
|---|---|
| Environment | Indoor/Outdoor |
| Connection | Plug-in Screw Terminal, RJ12 Socket |
Downloads
Documentation
- Merkur 2 BrochureBrochure · This model · 2.8 MBDownload
Certificate and compliance document (1)
- Merkur 2 EU Declaration of ConformityCertificate · This model · 385.6 KBDownload
User manual
Series documents can differ from your exact model. Report a wrong or missing file
Works with this product
Relevant accessories
- Bircher UniScan Infrared Safety Sensor for Swing and Revolving DoorsUniScan
Why UniScan (swing and revolving door safety) is an additional product for Merkur 2.
- Bircher DualSense S Infrared Safety Sensor for Sliding DoorsDualSense S
Why Supplements Merkur 2.
- Bircher CleanSwitch Touchless Door Switch with LED FeedbackCleanSwitch
Why Adds contact-free activation to Merkur 2.
Price on requestAdd to quote
Replacements and alternatives
- Bircher FutureSense 60 GHz FMCW Radar Sensor for Swing and Revolving DoorsFutureSense
Why Newer FMCW radar opening sensor with app setup for swing and revolving doors.
Questions about this product
What is the difference between Merkur 2 ES and ES.C?
Both have direction recognition. ES connects with a plug-in screw terminal and ES.C with an RJ12 socket.
Can Merkur 2 detect very slow pedestrians?
Yes. The SMD+ field detects movements below 5 cm/s, which Bircher recommends for elderly and disabled users.
How is Merkur 2 configured?
Basic settings with push buttons on the sensor; the full parameter range with the RegloBeam 2 remote control (sold separately).
Ask about this modelSetup, compatibility, what is in the box
Answers are automated. Do not enter personal or account details.








