Comparando os medidores de potencia

fonte: http://www.dcrainmaker.com

FUNCTION/FEATURE	CYCLEOPS POWERTAP G3	GARMIN VECTOR	POLAR/LOOK KEO POWER	POWER2MAX (OCT 12+)	SRAM QUARQ ELSA/RED
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GENERAL: PRICE	$720 (NO WHEEL)	$1699	$2295 (PEDALS ONLY)	$879+ (NO CRANKS)	$1995 (WITH CRANKS)
GENERAL: AVAILABLE TODAY	YES	YES	YES	YES	YES
GENERAL: MEASUREMENT TYPE	DIRECT FORCE	DIRECT FORCE	DIRECT FORCE	DIRECT FORCE	DIRECT FORCE
GENERAL: ATTACHMENT AREA	REAR WHEEL HUB	PEDALS	PEDALS	CRANK SPIDER	CRANK SPIDER
GENERAL: ATTACHMENT LIMITATIONS	N/A	LOOK KEO COMPATIBLE PEDALS ONLY	LOOK KEO PEDALS ONLY	SPECIFIC SUPPORTED CRANKS	SPECIFIC SUPPORTED CRANKS
GENERAL: WEIGHT (ADDITIONAL/NET)	315G/325G (FULL HUB)	175G PER PEDAL (INCLUSIVE)	24G	FROM 189G + CRANK	735G (INCLUDING CRANK)
GENERAL: WIRELESS CONNECTIVITY TYPE	ANT+	ANT+	POLAR W.I.N.D.	ANT+	ANT+
GENERAL: UNIT AUTO-TURNS ON WHEN ON BIKE	YES	YES	NO	YES	YES
FUNCTION/FEATURE	CYCLEOPS POWERTAP G3	GARMIN VECTOR	POLAR/LOOK KEO POWER	POWER2MAX (OCT 12+)	SRAM QUARQ ELSA/RED
BATTERY: BATTERY LIFE	300 HOURS	175 HOURS	465 HOURS	300-400 HOURS	300 HOURS
BATTERY: USER OR FACTORY BATTERY REPLACEMENT	USER	USER	USER	USER	USER
BATTERY: BATTERY TYPE	CR2032	CR2032	2 X CR2354	CR2450	CR2032
BATTERY: LOW BATTERY WARNING	YES	YES, 20 HOURS	YES	YES	YES
FEATURES: MEASURES/TRANSMITS CADENCE	YES (ESTIMATED)	YES	YES	YES	YES
FEATURES: ABILITY TO UPDATE FIRMWARE	YES	YES	NO	FACTORY ONLY	YES, WITH APP & CUSTOMER SERVICE.
FEATURES: TRANSMITS LEFT/RIGHT POWER ESTIMATE- LESSER	NO	N/A	N/A	YES	YES
FEATURES: TRANSMITS LEFT/RIGHT POWER MEASURED- BEST	NO	YES	YES	NO	NO
FEATURES: TRANSMITS PEDAL SMOOTHNESS	NO	PLANNED	NO	NO	NO
FUNCTION/FEATURE	CYCLEOPS POWERTAP G3	GARMIN VECTOR	POLAR/LOOK KEO POWER	POWER2MAX (OCT 12+)	SRAM QUARQ ELSA/RED
ACCURACY: MEASURES ALL POWER OUTPUT	YES	YES	YES	YES	YES
ACCURACY: CLAIMED ACCURACY LEVEL	+/- 1.5%	+/- 1.5%	+/- 2%	+/- 2%	+/- 1.5%
ACCURACY: INCLUDES TEMPERATURE COMPENSATION	YES	YES	YES	YES	N/A
ACCURACY: SUPPORTS AUTO-ZERO FUNCTION	YES	YES	NO	YES	YES
ACCURACY: SUPPORTS MANUAL CALIBRATION	YES	YES	NO	YES	YES
ACCURACY: SUPPORTS HANGING WEIGHTS (STATIC TEST)	YES	YES	NO	YES	YES
SOFTWARE: PHONE APP TO CONFIGURE/TEST	NO	DESKTOP APP (PC/MAC)	NO	NO	YES
FUNCTION/FEATURE	CYCLEOPS POWERTAP G3	GARMIN VECTOR	POLAR/LOOK KEO POWER	POWER2MAX (OCT 12+)	SRAM QUARQ ELSA/RED
PURCHASE: AMAZON LINK	LINK	FALL 2013	LINK	N/A	LINK
PURCHASE: CLEVER TRAINING LINK (SAVE 10% WITH DCR10TXS)	LINK	FALL 2013	LINK	N/A	LINK
DCRAINMAKER: REVIEW LINK	LINK	LINK	LINK	LINK	LINK