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 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 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 Temperature : ± 0.4° C
Relative mV Offset Range : ± 2000 mV
pH Calibration : automatic, 1, 2, 3, 4 or 5 point with 7 memorized buffers
( pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45)
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

Accessories :
Electrodes
HI 11X1 Series : Laboratory Combination pH and ORP Electrodes
HI 7669/ 2W : Temperature Probe
Solutions
HI 7004L : 4.01 pH Buffer Solution
1 x 500 mL bottle
HI 7007L : 7.01 pH Buffer Solution
1 x 500 mL bottle
HI 7010L : 10.01 pH Buffer Solution
1 x 500 mL bottle
HI 77400P : Combination pH Buffer Kit 4.01 & 7.01 pH
HI 70300L : Electrode Storage Solution
1 x 500 mL bottle
Accessories
HI 710005 : Voltage adapter from 115V to 12 Vdc ( USA plug)
HI 710006 : Voltage adapter from 230V to 12 Vdc ( European plug)
HI 92000 : Windows® Compatible Software for Logging Instruments,
Photometers and Turbidity Meters
HI 920010 : Cable for PC Connection, 9 to 9-pin
HI 76404 : Electrode Holder