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Technical documents
1Key technical specifications
The most critical technical parameters of this product.
- Supply 24 V DC
- Operating principle Microwave / IR approach detection
- Detection distance 5 – 15 cm (adjustable)
- Response time < 200 ms
- Output NO dry contact (pulse signal)
- Protection class IP44
Show all technical specifications (9)
Mechanical
| Feature | Value |
|---|---|
| Body | Stainless steel / white plastic |
| Operating temperature | -10 – +50 °C |
Hygiene
| Feature | Value |
|---|---|
| Disinfection | IPA + standard disinfectant resistant |
Videos
Overview
r-tec Hand Sensor is an approach sensor that generates a door-opening signal via touch-free hygienic detection. Just bringing your hand close is enough instead of a standard button/card reader — it is used in hospital, pharma facility, food business and clean room applications for cross-contamination prevention. It is also spreading to office and retail entrances as a modern post-pandemic hygiene standard.
Why touch-free?
Traditional door opening:
- Button — Multiple people touch it; bacteria/virus carrying risk
- Card reader — Card touches, gloves required
- Handle — Door handle = highest contact surface
Hand Sensor solution:
- No contact — Detects when hand approaches 5-15 cm
- Glove compatible — Detection works through gloves
- Fast + intuitive — No user training required
- Easy disinfection — Wipeable with IPA + standard disinfectant
Target sectors
| Sector | Application |
|---|---|
| Hospital | Operating theatre + ICU entry, isolation room |
| Pharma facility | GMP clean room, production area |
| Food facility | Clean/dirty area separation, cold storage |
| Laboratory | Bio-safety + chemistry laboratory |
| Hotel/Restaurant | Kitchen + bathroom hygienic entry |
| Office | Post-pandemic hygiene standard |
Detection principles
Two technology variants available:
| Technology | Advantage | Limitation |
|---|---|---|
| Microwave | Detects through glass/plastic | First calibration required |
| IR (infrared) | Clear detection over surface | Direct line of sight required |
In hospital clean room applications, microwave is recommended — the sensor can remain hidden inside the rear glass panel.
R2 control board integration
The hand sensor output is NO (Normally Open) dry contact — connected to the safety chain terminal of the r-tec R2 automatic door control board. When the sensor is triggered:
- NO contact closes → R2 receives door open command
- Door opens → R2 enters standard full open mode
- When automatic closing time expires, door closes
- If 2nd trigger comes, door opens again
Field discipline
- Sensor position — 50-80 cm height from door side profile (middle-height pedestrian hand height)
- Detection distance calibration — 10 cm setting during first commissioning; wide setting = false trigger
- Disinfection resistance — Wipe with IPA and standard disinfectant every 6 hours; no corrosion occurs
- LED visibility — Detection LED guides the user; external LED warning added on hidden sensors
- Periodic test — Monthly manual test (hand approach → door opened?) mandatory
- Hygiene audit — Sensor type + detection distance certificate can be presented in health audit
Frequently Asked Questions
Below we've compiled the most common questions and answers regarding this product.
-
Why is a hand sensor preferred in facilities requiring hygiene?
The sensor works by microwave or infrared proximity detection and picks up a hand at a range adjustable between 5 and 15 cm; no contact is needed, so the button stops being a shared touch surface. In hospital, food and pharmaceutical facilities, preventing cross-contamination is therefore a direct gain. The housing is stainless steel or white plastic and resists isopropyl alcohol and standard disinfectants, so the cleaning routine does not degrade the surface. Response time is under 200 milliseconds and the output is a normally open dry contact giving an impulse.
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Why is the detection range limited to 15 cm?
The short range is a deliberate design choice: the sensor's purpose is to detect the intentional gesture of someone wanting to open the door, not everyone who approaches. Extend the range and passing staff or carried goods open the door needlessly, which in hygiene zones means the pressure difference and temperature separation are lost. Where general approach detection is wanted, the right accessory is a radar or active infrared sensor. The 5 to 15 cm range is set according to corridor width and the height the sensor is mounted at.
Contact our team for model-specific information or a quote.