Model		HI 9024	HI 9025
Range	pH	0.00 to 14.00 pH	0.00 to 14.00 pH
	mV	-	±399.9 mV; ±1999 mV
	temperature	0.0 to 100.0°C / 32 to 212.0°F	0.0 to 100.0°C / 32 to 212.0°F
Resolution	pH	0.01 pH	0.01 pH
	mV	-	0.1 mV; 1 mV
	temperature	0.1°C / 0.1°F	0.1°C / 0.1°F
Accuracy	pH	±0.01 pH	±0.01 pH
	mV	-	±0.2 mV; ±1 mV
	temperature	±0.4°C; ±0.8°F	±0.4°C; ±0.8°F
pH calibration		Automatic, 1 or 2 point with 5 memorized buffer values (pH 4.01, 6.86, 7.01, 9.18, 10.01); offset calibration: ±1 pH; slope calibration: 70 to 108%	Automatic, 1 or 2 point with 5 memorized buffer values (pH 4.01, 6.86, 7.01, 9.18, 10.01); offset calibration: ±1 pH; slope calibration: 70 to 108%
Temperature compensation		Automatic or manual, -5 to 105°C (23 to 221°F)	Automatic or manual, -5 to 105°C (23 to 221°F)
pH electrode		HI 1230B double junction, PEI (PolyEther-Imide) body, gel filled, BNC connector and 1 m(3.3')cable(included)	HI 1230B double junction, PEI (PolyEther-Imide) body, gel filled, BNC connector and 1 m(3.3')cable(included)
Temperature probe		HI 7669/2W with 1 m(3.3')cable (included)	HI 7669/2W with 1 m(3.3')cable (included)
Input impedance		1012 Ohm	1012 Ohm
Battery type/life		4 x 1.5V AA/approx. 500 hours of continuous use(with backlight OFF): auto-off after 20 minutes of non-use(can be disabled)	4 x 1.5V AA/approx. 500 hours of continuous use(with backlight OFF): auto-off after 20 minutes of non-use(can be disabled)
Environment		0 to 50°C(32 to 122°F); RH max 100%	0 to 50°C(32 to 122°F); RH max 100%
Dimensions		196 x 80 x 60 mm(7.7 x 3.1 x 2.4")	196 x 80 x 60 mm(7.7 x 3.1 x 2.4")
Weight		500 g(1.1 lb.)	500 g(1.1 lb.)