4-Wire resistive touch screen is the preferred solution for low cost applications. It consists of a conductive bottom layer (ITO Glass or Film) and a conductive top layer (ITO Film). The two layers are suspended by many very small spacer dots. When a certain point is touched, the top layer contacts the bottom layer and a voltage charged by the controller is applied to the bottom layers electrodes. The coordinate X axis of the touch point can be detected by measuring the voltage value thru the top ITO layer and the coordinate Y axis of the touch point can be detected in the same way by changing voltage input to the top layers electrodes.

We offer the 4wire resistive touch panel from 5.7" to 22" with high quality and stability.

Specification
Surface Hardness  3H
Transmittance above 85 %
OperatingTemperature  -10 centigrade ~ 60 centigrade  
Work Life  Over 1million times  
Operation Voltage  DC5V
X\Y Resistance 200次 ~ 900次(a little bit different due to different sizes)  
Linearity < 1.5%  
Film Type  Anti glare hard coating  
Opearting Pressure  15~70g  
Storage Temperature  -20 centigrade~ 70 centigrade
Noise  5 m sec ~ 15 m sec  
Operating Current  5mA ~ 25mA
Connector Resistance  200次< X xis <800次
300次< Y Axis <900次  
Insulation Resistance  above 20M次 @ DC 25V  
Electrostatic Endurance  No abnormal appearance after 10kv, 100W, 250PF electrostatic used.