These keyboards comprise of a Snap Dome Switch and glass epoxy PCB which is used as a base and for the circuit. (See photograph) A layer of Polyester or Polycarbonate covers and seals this assembly using Industrial Grade Adhesives made by manufacturers like 3M, Avery Dennison, etc. These type of sealed keyboards can be offered in any size and shape and are made as per customer's specifications and requirements.

These keyboards can also accommodate LEDs of various colours and shapes. Any solderable type of connector like Berg strips, FRC, Relimate, D Type etc. can be provided.

The Overlay layouts can be made as per customers' requirements and any colour shade can be used for the keys as well as the backgrounds. The switch / LED areas can be embossed (see photograph)

Considering the type of adhesives and engineering plastics used, these keyboards can be used in any type of harsh environment applications - Shop Floor (CNC machine tools, Process Controllers), Medical systems, External Devices, Defence Equipments, etc.

1. Gold plated contacts for superior switch performance.
2. Industrial grade adhesives used to withstand harsh environmental factors.
3. Polyester Overlay used to withstand even Industrial solvents.
4. Overlay legends can be printed on keys as per Customer's requirements.
5. Can accomodate LEDs / Components thus saving space inside the equipment.

Electrical:         Contact Arrangement :   SPST Normally Open   Current / Voltage Rating :   10 mA at 24 VDC (max) in to resistive load only   Contact Resistance :   Compatible with MOS, TTL & DTL Circuits   Contact Bounce :   Less than 10 milliseconds at make & 20 milliseconds at break         Mechanical:         Operating Temperature :   -20oC to + 65oC   Key Travel :   380 microns   Life expectancy :   One million to Three million operations   Operating Temperature :   -20 deg to 65 deg centigrade   Humidity :   95% RH at 40oC         Materials:         Base :   Glass Epoxy PCB FR4 Grade in thickness ranging from 0.4 mm to 3.2 mm   Plating :   Bright Acid Tin; Nickel, Gold over Nickel   Adhesives :   Industrial Grade from 3M , Avery Dennision   Overlays :   Polycarbonate - Lexan; Polyester - Autotex