Solar Biotronic Laboratories Private Limited, (SBL) offers Capacitive Switches with infinite life.

The working of these switches is based on Charge Detector (CD) technology. When any user touches the key / switch area the capacitive charge from the user’s body is detected by a specially developed circuit, and the signal is passed on to the system. The solid state nature of the circuit makes the life of such a switch virtually infinite.

As a result, such keyboards are very much suited for harsh environments, where switch abuse, use of dirty hands is a common practice.

The switches can be offered on any dielectric materials like glass, plastics, wood, granite, etc.

1. Toggle Switching Operations
2. Pulsed Operation
3. Direct interface of switches with User's system via UART / I2C / RS 232 / Parallel ports etc.
4. Back lit switches
5. In built LED Driver for visual feedback which saves user end I/O ports
6. Switch Operation through any dielectric like Glass, Wood, Granite, Tiles, Plastics, etc.

1. Security Systems
2. Elevator Buttons
3. Bio-medical Applications
4. Indicator Switches
5. IP grade Applications

Besides the above, keyboards can be designed as per customers' requirements with reference to size, number of switches, graphic overlay, circuit parameters, interface connectors, etc.

	Electrical
	Supply Voltage	:		5-24 VDC
	Output	:		NPN/PNP/Relay contact/ UART/I2C/RS232/Parallel port
	Bounce / Debounce time	:		Nil
	Contact Resistance	:		Nil
	Function	:		Momentary /Latching
Mechanical
	Actuating Force	:		Finger Touch
	Operating Temp.	:		-20oC to +85oC