Capacitance Zero Force Sensors
How does the SENSORswitch work?
SENSORswitches are capacitive pushbuttons which are activated without pressure, using a hand or other parts of the body. The buttons have a determinate sensing distance, which may be altered, however, by varying the approach speed and/or damping factor. A quickly approaching finger will achieve a higher sensing distance than a slowly approaching finger. A hand, with its larger damping surface, will achieve a greater sensing distance than a finger at the same speed. Sensitivity of the buttons is specified by the electronic circuit and cannot be changed serially. All sensors are checked for consistent sensitivity values, which have been determined by long-standing experience.
A capacitive sensor measures the capacity between the sensor surface and the surroundings of the sensor. Approaching the SENSORswitch, for example with the hand, increases the capacity and generates an output signal. A field will be generated over the sensor area of the SENSORswitch which provides continuous analogue measurement. If this field is changed by the hand and once this change is sufficiently large, the integrated software detects the change and triggers a switching process. As human beings consist largely of water, the human body has a relatively high conductivity. This is why sensors based on the capacitive principle are extremely good SENSORswitches
Advantages of SENSORswitches
Characteristics making the capacitive CAPTRON SENSORswitch a unique product:
- TThe water-tight encapsulated electronic system and the weatherproof housing material (poly-carbonate) makes the pushbuttons have a long service life.
- No mechanical motion so the SENSORswitch is maintenance-free.
- The contact-free switching operation, the vandal-proof system, and, first and foremost, the unlimited switching cycles make our SENSORswitch a high-quality product.
- Due to their special design the SENSORswitches can be mounted quickly and flexibly on either walls, doors or glass, resulting in only minimal installation costs.
- Pressure-free switching employing the capacitive principle allows switching through glass. The SENSORswitches for glass-mounting are snapped into previously glued mounting rings on the glass panel of the door or window. This way the switches can be activated without the need for drilling holes through the glass.
Operation functions
Dynamic- The dynamic SENSORswitches are capacitive pushbuttons which are activated without pressure, using a hand or other parts of the body. The output signal is limited to 400ms. The buttons have a determinate sensing distance, which may be altered, however, by varying the approach speed and/or damping factor. A quickly approaching finger will achieve a higher sensing distance than a slowly approaching finger. A hand, with its larger damping surface, will achieve a greater sensing distance than a finger at the same speed.
Static- The static SENSORswitches are capacitive pushbuttons which are activated without pressure, using a hand or other parts of the body. The output signal is high as long as the sensor area is touched. The buttons have a determinate sensing distance, which is depending on the damping factor. A hand, with its larger damping surface, will achieve a greater sensing distance than a finger at the same speed.
CHT1- Screw Mounting
Since you can configure a CHT1 according to your requirements by selecting from a wide range of designs, functions and connections, the applications and circuits no longer have to be adapted to suit the switch – the switch is adapted to suit your applications and circuits.
- Touch Control- High ease of use, no mechanical pressure required.
- Feedback- Optical signals through two LED rings.
- Shock-resistant- The sensor cannot be destroyed by lighter flames or severe blows.
- 100 % water & oil-proof – IP69K Sensor completely sealed in cast resin.
- Durable service life- More than 100 million operation cycles (transistor output).
Operating surface Ø 20 mm
CHT3- Screw Mounting
The capacitive SENSORswitch CHT3 is designed for screw mounting and switch by touch. The field of application extends over the automation, transportation, emergency and information pillars. The SENSORswitch can be equipped in addition to the optical feedback with an acoustic signal.
- Touch Control- High ease of use, no mechanical pressure required.
- Feedback- Visual and acoustic signals through 16 LEDs and beeper.
- Shock-resistant- The sensor cannot be destroyed by lighter flames or severe blows.
- 100 % water & oil-proof – IP69K Sensor completely sealed in cast resin.
- Durable service life- More than 100 million operation cycles (transistor output).
- Accessibility- Braille and raised chevrons on colored cover ring or sensor area.
Operating surface Ø 50 mm
CHT4- Screw Mounting
The capacitive SENSORswitch CHT4 is designed for screw mounting and switch by touch. The field of application extends over the automation, transportation, emergency and information pillars. The SENSORswitch can be equipped in addition to the optical feedback with an acoustic signal and/or a tactile feedback via vibration.
- Touch Control- High ease of use, no mechanical pressure required.
- Feedback- Feedback Visual, tactile and acoustic signals through 16 LEDs, vibration and beeper.
- Shock-resistant- The sensor cannot be destroyed by lighter flames or severe blows.
- 100 % water & oil-proof – IP69K Sensor completely sealed in cast resin.
- Durable service life- More than 100 million operation cycles (transistor output).
- Accessibility- Braille and raised chevrons on colored cover ring, 25 cm² operating surface.
Operating surface Ø 63 mm
CHT9- Adhesive Mounting, Single Sided Operation
The SENSORswitches in the CHT9 series are capacitive switches with an exceptionally flexible range of mounting and
application options on glass or metal surfaces. Besides the hole for the sensor element no further mounting holes are required, thus a simple and easy mounting is achieved by means of high-performance adhesive film.
- Adhesive mounting- No screws required.
- Touch Control- High ease of use, no mechanical pressure required.
- Feedback- Feedback Visual, tactile and acoustic signals through 16 LEDs, vibration and beeper.
- Shock-resistant- The sensor cannot be destroyed by lighter flames or severe blows.
- 100 % water & oil-proof – IP69K Sensor completely sealed in cast resin.
- Durable service life- More than 100 million operation cycles (transistor output).
Operating surface Ø 63 mm
HWT2- Stop Request Button for Rod and Wall Mounting
The HWT2 from CAPTRON is the first and, so far, only capacitive stop-request button worldwide. This capacitive button is suitable both for mounting on rods of different diameters (30, 34, 35 mm) and mounting on walls. The innovative mounting system enables installation without visible screws.
- Touch Control- High ease of use, no mechanical pressure required.
- Feedback- Visual and acoustic feedback through 12 LEDs and beeper.
- Durable service life- More than 100 million operation cycles (transistor output).
- Accessibility- Braille and raised chevrons on the housing or sensor area.
Operating surface 16 cm2
HWT3- Stop Request Button with Graphic Display, for Rod Mounting
The HWT3 has a graphic display which makes it user friendly and easier to operate. The stop request button allows the appropriate information to be displayed to the user depending on the current status of the route. The passenger receives visual feedback. Whether a request to stop, to open the door, to engage the ramp, etc., in the bus or train, the display possibilities are unlimited.
- Touch Control- High ease of use, no mechanical pressure required.
- Graphic Display- Can show up to four moving images / sequences: LCD module with 64×72 pixel.
- Feedback- Visual and acoustic signals through graphic display, 16 LEDs and beeper.
- Durable service life- More than 100 million operation cycles (transistor output).
