Compare All Elo Touch Technologies

Compare All Resistive Touch Technologies (4-, 5-, 6-, 7-, 8-wire variations)

Key	Best in category	Some advantage	Neutral	Perhaps not acceptable	Not possible, worst in category

	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Performance:
Speed
Sensitivity
Resolution
Accuracy
Calibration Stability
Drag
Z-axis
Double Touch 1
Parallax (lack of)						2			3
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Input Flexibility:
Glove	4								4
Finger
Fingernail
Credit Card
Pen
Signature Capture
Handwriting Recognition
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Optics:
Light Transmission						5
Reflection (lack of)						5
Clarity
Color Purity
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Mechanical:
Small Sizes (<10")
Large Sizes (>19")							6
Curved CRTs
Ease of Integration
Sealability				7	7	7
IP65; NEMA 4	14
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Electrical:
Controller Chip Available
Low Power; Battery Operation
Operation with Poor Ground
ESD
EMI; RFI
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Environmental:
Temperature
Humidity
Shock; Vibration
Altitude
In-vehicle
Chemical Resistance
Scratch Resistance								8	8
Breakage Resistance								8	8
Safe Break Pattern
Dust; Dirt
Liquids				9	9	9
Rain		10	10
Snow
Ice
Ambient; UV  Light		11	11
Fly on Screen
Non-Glass Surface Possible 12
Works Through Other Materials	13
Durability; Wear
EMI; RFI
Surrounding Metal
	APR	AT4 4-wire resistive	AccuTouch 5-wire resistive	IntelliTouch surface wave	SecureTouch surface wave	iTouch surface wave	Surface capacitive	Projected capacitive *	CarrollTouch infrared
Reliability; Warranty Length
Lowest Cost

Notes

^* This technology is currently unavailable in the United States
¹  = incorrect (averaged) coordinate reported;  = simultaneous touches rejected, nearly simultaneous touches reported accurately
² Touch is closest to image as there is no overlay
³ Touch activates just before actual contact (1mm)
⁴ Only technology recommended for metal gloves
⁵ The utmost possible as there is no overlay
⁶ For LCDs only; plasma is not possible, due to EMI
⁷ Special sealing materials required (Elo touchmonitors are watertight sealed)
⁸ Assuming proper materials used
⁹ Although splashing liquids are OK, extended rain and humidity exposure can lead to internal condensation
¹⁰ Works with stationary water drops; excessive or moving water must be wiped away
¹¹ Polyester coversheet may yellow after years of exposure
¹² Required for food processing and some in-vehicle applications
¹³ Depends upon the efficent transfer of acoustic energy
¹⁴ Depends upon model - check individual model specifications

No guarantee of acceptability of the technology to the application is implied by this quick reference table

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