Specification :

HI 253 and HI 254 pH/ ORP bench meters are ideal for very accurate and precise measurements in all laboratory settings. Both meters can store up to 50 data sets in non-volatile memory which can be downloaded to a PC.

These instruments also have GLP features so, at any time, the user can recall the calibration data.

HI 253 can perform ion-selective ( ISE) measurements directly in ppm. Chose from our newly developed line of specific ion sensors for your specific application.

pH calibration with HI 254 can be customized with up to 5 points - selected from 7 memorized buffers - to provide a very accurate calibration curve even when testing difficult samples, where very wide differences in pH may occur during the same process.

HI 253 and HI 254 are each supplied with a pH electrode, temperature probe for automatic compensation during pH measurements and ready-to-use calibration solutions.

Specifications :
Range pH : -2.0 to 16.0 pH; 2.00 to 16.00 pH; -2.000 to 16.000 pH
Range mV : ± 699.9 mV; ± 2000 mV
Range Selective Ions : 0.001 to 19999 ppm
Range Temperature : -9.9 to 120.0° C
Resolution pH : 0.1 pH; 0.01 pH; 0.001 pH
Resolution mV : 0.1 mV ( ± 699.9 mV) ;
1 mV ( ± 2000 mV)
Resolution Selective Ions : 0.001 ( 0.001 to 9.999) ppm
0.01 ( 10 to 99.99) ppm
0.1 ( 100 to 999.9) ppm
1 ( 1000 to 19999) ppm
Resolution Temperature : 0.1° C
Accuracy pH : ± 0.1 pH; ± 0.01 pH; ± 0.002 pH
Accuracy mV : ± 0.2 mV ( ± 699.9 mV) ;
± 1 mV ( ± 2000 mV)
Accuracy Selective Ions : ± 0.5%
Accuracy Temperature : ± 0.4° C
Relative mV Offset Range : ± 2000 mV
pH Calibration : automatic, 1, 2 or 3 point with 5 memorized values
( pH 4.01, 6.86, 7.01, 9.18, 10.01)
ISE Calibration : automatic, 1 or 2 point ( 0.1, 1, 10, 100, 1000 ppm)
Temperature Compensation : Automatic ( with HI 7669/ 2W probe) or manual from -9.9 to 120° C
pH Electrode : HI 1131B, glass-body, double junction, refillable,
BNC connector, 1 m ( 3.3' ) cable ( included)
Temperature Probe : HI 7669/ 2W with 1 m ( 3.3' ) cable ( included)
Input Impedance : 1012 Ohm
PC Connection : RS232 opto-isolated serial port
Power Supply : 12 Vdc adapter ( included)
Environment : 0 to 50° C ( 32 to 122° F) ; RH max 95%
Dimensions : 240 x 182 x 74 mm ( 9.4 x 7.2 x 2.9" )
Weight : 1.1 kg ( 2.4 lb.)

Included Reagents :
- HI 70004
- HI 70007
- HI 7071S
- HI 7071