Hanna Instruments HI 9023C User manual

Instruction Manual
HI 9023C - HI 9023CN
HI 9024C - HI 9025C
HI 9110 - HI 9210
HI 9210N
Portable Waterproof
pH Meters
Manufacturers since 1978 These Instruments are in
Compliance with the CE Directives
MANPHWPR3
09/04
PRINTED IN CANADA

2
PRELIMINARY EXAMINATION........................................................ 3
GENERAL DESCRIPTION ............................................................... 3
FUNCTIONAL DESCRIPTION HI 9023C & HI 9023CN ..................... 5
SPECIFICATIONS HI 9023C & HI 9023CN ..................................... 6
FUNCTIONAL DESCRIPTION HI 9024C & HI 9025C ........................ 7
SPECIFICATIONS HI 9024C & HI 9025C ....................................... 8
FUNCTIONAL DESCRIPTION HI 9110 ............................................ 9
FUNCTIONAL DESCRIPTION HI 9210 & HI 9210N ....................... 10
SPECIFICATIONS HI 9110, HI 9210 & 9210N ............................ 11
OPERATIONAL GUIDE ................................................................ 12
pH CALIBRATION....................................................................... 16
pH VALUES AT VARIOUS TEMPERATURES ................................... 24
TROUBLESHOOTING GUIDE ........................................................ 25
ELECTRODE CONDITIONING AND MAINTENANCE.......................... 26
TAKING REDOX MEASUREMENTS (HI 9023C & HI 9025C only) .... 29
BATTERY REPLACEMENT & AUTO-OFF ......................................... 30
ACCESSORIES ........................................................................... 31
ELECTRODE APPLICATION REFERENCE GUIDE .............................. 37
WARRANTY ............................................................................... 38
CE DECLARATION OF CONFORMITY ............................................. 39
Dear Customer,
Thank you for choosing a Hanna Product. Please read this instruction
manual carefully before using the instrument. It will provide you with
the necessary information for a correct use of the instrument, as well
as a precise idea of its versatility. If you require further technical
information, do not hesitate to e-mail us at [email protected].
These instruments are in compliance with the directives EN 50081-1
and EN 50082-1.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
39
Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environment in which they are used.
Operation of these instruments in residential area could cause unacceptable interference to radio and TV equipment,
requiring the operator to take all necessary steps to correct interference.
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all
times.
During calibration of instruments, ESD wrist straps should be worn to avoid possible damage to the electrode by
electrostatic discharge.
To maintain the EMC performance of equipment, the recommended cables noted in the user's manual must be used.
In particular cases the instruments could turn off. In such cases, turn them on by pressing the ON/OFF key.
Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance.
Toavoidelectricalshock,donotusetheseinstrumentswhenvoltagesatthemeasurementsurfaceexceed24VACor60VDC.
To avoid damage or burns, do not perform any measurement in microwave ovens.
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITY

3
These waterproof Hanna instruments are heavy-duty pH meters de-
signed to provide laboratory results and accuracy under harsh industrial
conditions.
HI 9023C, pH/mV/°C meter utilizes an advanced customized micro-
processor. The meter has three memorized buffer values (4.01, 7.01
and 10.01) and automatic buffer recognition to avoid errors during
calibration. There are no trimmers, making calibration an easy pro-
cess, even for non-technical personnel. Temperature effects are
automatically compensated for, or can be manually adjusted. With
HI 9023CHI 9023C
HI 9023CHI 9023C
HI 9023C you can also measure ORP (Oxidation Reduction Potential)
or Ion Specific. Millivolt measurements automatically switch from 0.1
to 1 mV resolution when the reading reaches 400mV.
HI 9023C is supplied with HI 1230B combination double-junction gel
pH electrode, HI 7669/2W temperature probe, pH 4.01 and 7.01 (20
mL each) buffer solutions, sample vessel, 1.5V AA size batteries (4
each) and a rugged carrying case.
HI 9023CN, pH/mV/°C meter utilizes an advanced customized
microprocessor. The meter has three memorized buffer values (4.01,
7.01 and 10.01) and automatic buffer recognition to avoid errors
during calibration. Temperature effects are automatically compen-
sated for.
HI 9023CN is supplied with HI 1217D 4-in-1 amplified, gel pH/°C
electrode, pH 4.01 and 7.01 (20 mL each) buffer solutions, sample
vessel, 1.5V AA size batteries (4 each) and a rugged carrying case.
HI 9024C and HI 9025C are pH/°C meters with a built-in micropro-
cessor. A large dual-level LCD displays the pH and temperature
simultaneously. The display has graphic symbols to make the calibra-
tion procedure easy to follow. The meters have 5 memorized buffer
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, notify your Dealer immediately.
Note: Save all packing materials until you are sure that the instru-
ment functions correctly. Any damaged or defective item must
be returned in its original packing materials together with the
supplied accessories.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
38
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
All Hanna Instruments meters are guaranteed for two years
against defects in workmanship and materials when used for their
intended purpose and maintained according to instructions. The
electrodes and the probes are guaranteed for a period of six
months. This warranty is limited to repair or replacement free of
charge.
Damage due to accident, misuse, tampering or lack of prescribed
maintenance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of
purchase, serial number and the nature of the failure. If the repair is
not covered by the warranty, you will be notified of the charges
incurred. If the instrument is to be returned to Hanna Instruments, first
obtain a Returned Goods Authorization number from the Customer
Service department and then send it with shipping costs prepaid.
When shipping any instrument, make sure it is properly packaged for
complete protection.
To validate your warranty, fill out and return the enclosed warranty
card within 14 days from the date of purchase.
All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner,
Hanna Instruments Inc.
Hanna Instruments reserves the right to modify the design, con-
struction and appearance of its products without advance notice.

4
values (4.01, 6.86, 7.01, 9.18 and 10.01), buffer recognition to
avoid errors during calibration and automatic temperature compensa-
tion. You can use HI 9025C with ORP (Oxidation Reduction Potential)
or Ion Specific Electrodes. Millivolt measurements automatically switch
from 0.1 to 1 mV resolution when the reading reaches 400 mV. To
insure trouble-free operation, the meter's circuitry comes with built-in
protection against electromagnetic interference.
HI 9024C and HI 9025C are supplied with HI 1230B combination
double-junction, gel pH electrode, HI 7669/2W temperature probe,
pH 4.01 and 7.01 (20 mL each) buffer solutions, sample vessel, 1.5V
AA size batteries (4 each) and a rugged carrying case.
HI 9110, pH meter, has simple manual temperature compensation
and calibration which make this meter easy to use in laboratory and
field. The calibration trimmers are sealed behind a protective cover so
that they cannot be accidentally moved or readjusted by unauthorized
persons.
HI 9110 is supplied with FC 100B combination double-junction,
refillable pH electrode, calibration screwdriver, 1.5V AA size batteries
(4 each) and a soft carrying case.
HI 9210 pH meter has simple manual temperature compensation
and calibration with only two buttons, making it simple to use for
even non-technical personnel. The calibration trimmers are sealed
behind a protective cover so that they cannot be accidentally moved or
readjusted by unauthorized persons.
HI 9210 is supplied with HI 1230B combination double-junction, gel
pH electrode, calibration screwdriver and 1.5V AA size batteries (4
each).
HI 9210N pH/°C meter measures both pH and temperature. It has
only two buttons, making it simple to use for even non-technical
personnel. The calibration trimmers are sealed behind a protective
cover so that they cannot be accidentally moved or readjusted by
unauthorized persons.
HI 9210N is supplied with HI 1217D 4-in-1, gel, amplified pH/°C
electrode, calibration screwdriver and 1.5V AA size batteries (4 each).
37
Application Electrodes*
1. Aquarium HI 1332B
2. Bath-water HI 1130B
3. Beer HI 1131B
4. Bread HI 2031B, FC 200B
5. Cheese FC 200B
6. Dairyproducts FC 100B
7. Dirtywater HI 1230B
8. Emulsions HI 1053B
9. Environment HI 1230B
10. Flasks HI 1331B
11. Food industry general use FC 911B, FC 100B
12. Fruit FC 200B, FC 220B
13. Fruit juices, organic FC 210B
14. Galvanizing waste solution HI 1130B
15. Heavy-duty applications HI 1135B
16. High purity water HI 1053B
17. Horticulture HI 1053B, FC 200B
18. Laboratorygeneral use HI 1131B, HI 1230B, HI 1332B, HI 1330B
19. Leather HI 1413B
20. Lemon juice FC 100B
21. Meat FC 200B, HI 2031B
22. Micro plate sampling of less than HI1083B
100 mL
23. Milk and Yogurt FC 210B
24. Paints HI 1053B
25. Paper HI 1413B
26. Photographic chemicals HI 1230B
27. Quality control HI 1332B
28. Sausages FC 200B, HI 2031B
29. Semisolid products HI 2031B
30. Skin HI 1413B
31. Soil samples HI 1230B
32. Solvents HI 1043B
33. Strongacid HI 1043B
34. Submersion application HI 1130B
35. Surface measurements HI 1413B
36. Swimming pool H I1130B, HI 2114P/2
37. Titrations with constant HI 1131B
temperaturerange
38. Titrationswith wide temperature HI 1131B
range
39. Very high humidity FC 911B
40. Vials and test tube HI 1330B
41. Wine processing FC 220B
ELECTRODE APPLICATIONELECTRODE APPLICATION
ELECTRODE APPLICATIONELECTRODE APPLICATION
ELECTRODE APPLICATION
REFERENCE GUIDEREFERENCE GUIDE
REFERENCE GUIDEREFERENCE GUIDE
REFERENCE GUIDE
* All electrode listed are supplied with 1m (3") cable and BNC
connector.

5
1) Electrode connector (BNC for HI 9023C and DIN for HI 9023CN)
2) Temperature probe socket (HI 9023C only)
3) Liquid Crystal Display
4) CAL key to enter or exit calibration mode
5) CFM key to confirm calibration
6) Ï°C and аC°C
°C°C
°C keys for manual temperature setting
(HI 9023C only)
7) ON/OFF key to turn the instrument on or off
8) RANGE key to select pH, °C or mV
9) Low battery indicator (additional decimal point)
10) Mode indicator
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
HH
HH
HII
II
I9023C & HI 9023CN9023C & HI 9023CN
9023C & HI 9023CN9023C & HI 9023CN
9023C & HI 9023CN
36
ORP electrodes:
HI 3131B
Glass-body, refillable, combination platinum ORP electrode.
Use: titration.
HI 3230B
Plastic-body (Ultem®), gel-filled, combination platinum ORP elec-
trode. Use: general purpose.
HI 4430B
Plastic-body (Ultem®), gel-filled, combination gold ORP electrode.
Use: general purpose.
150 mm
5.9"
12 mm
0.5"
"S" VERSION
HI 3131
120 mm
4.7"
12 mm
0.5"
HI 3230
"S" VERSION
120 mm
4.7"
12 mm
0.5"
HI 4430
"S" VERSION
Consult the Hanna General Catalog for an extensive selection of
electrodes.
OTHER ACCESSORIES
ChecktempC Pocket-size thermometer (range -50.0 to 150.0°C)
HI 76405 Electrode holder
HI 7669/2W Temperature probe with 1 m (3.3') screened cable
(not HI 9110, HI 9210, HI 9210N and HI 9023CN)
HI 8427 pH and ORP electrode simulator with 1 m (3.3') coaxial
cable ending in female BNC connectors
HI 931001 pH and ORP electrode simulator with LCD and 1 m
(3.3') coaxial cable ending in female BNC connectors
HI 721317 Rugged carrying case

6
SPECIFICATIONS HSPECIFICATIONS H
SPECIFICATIONS HSPECIFICATIONS H
SPECIFICATIONS HII
II
I9023C9023C
9023C9023C
9023C
& HI 9023CN& HI 9023CN
& HI 9023CN& HI 9023CN
& HI 9023CN
HI 9023C HI 9023CN
Range 0.00 to 14.00 pH
±399.9 mV (ISE); ±1999 mV (ORP)
0.0 to 100.0°C 0.0 to 70.0°C
Resolution 0.01 pH
0.1 mV (ISE); 1 mV (ORP)
0.1°C
Accuracy ±0.01 pH
(@20°C/68°F) ±0.2 mV (ISE); ±1 mV (ORP)
±0.4°C ±0.5°C
Typical EMC ±0.02 pH
Deviation ±0.2 mV; ±1 mV
±0.2°C ±0.5°C
Calibration Automatic with 3 memorized standard
buffers (4.01, 7.01, 10.01)
Temperature Automatic or manual Automatic
Compensation 0 to 100°C (32-212°F) 0 to 70°C (32-158°F)
Electrode HI1230B plastic body, HI1217D plastic body,
combination pH, BNC 4-in-1 gel pH/°C, DIN
1 m cable (included) 1 m cable (included)
Temperature Probe HI 7669/2W (incl.) not necessary
Input Impedance 1012 Ohm
Battery Type & Life 4x1.5V, AA size (alkaline batteries)
approx. 400 hours of continuous use
auto-shut off after 10 minutes of non-use
Environment 0 to 50°C (32 to 122°F); 100% RH
Dimensions 196x80x60 mm (7.7x3.1x2.4") (meter)
340x230x80 mm (13.8x9x3.1") (kit)
Weight 425 g (15 oz.) (meter)
1.3 Kg (3.0 lb.) (kit)
35
120 mm
4.7"
12 mm
0.5"
FC 210
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
FC 220
FC 210B
Glass-body, double junction, conic, Viscolene, non-refillable, combina-
tion pH electrode. Use: milk, yogurt.
FC 220B
Glass-body, triple-ceramic, single junction, refillable, combination pH
electrode. Use: food processing.
FC 911B
Plastic-body (Kynar®), double junction, refillable with built-in ampli-
fier, combination pH electrode. Use: very high humidity.
HI 1413B
Glass-body, single junction, flat tip, Viscolene, non-refillable, combi-
nation pH electrode. Use: surface measurement.
110 mm
4.3"
12 mm
0.5"
FC 911
110 mm
4.3"
12 mm
0.5"
HI 1413
Kynar®is registered Trademark of "Pennwalt Corp."
Ultem®is registered Trademark of "General Electrics Co."

7
1) BNC electrode connector
2) Temperature probe socket
3) Liquid Cristal Display
4) RANGE key to select pH or mV (HI 9025C only)
5) ON/OFF key to turn the meter on or off
6) CAL key to enter or exit calibration mode
7) CFM key to confirm calibration
8) Ï°C and аC°C
°C°C
°C keys for manual temperature setting, or
selecting pH buffer value
9) MEM key to store pH value in memory
10) MR key to recall the stored value from memory
11) User-friendly graphic symbols
12) Primary display
13) Secondary display
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
HH
HH
HII
II
I9024C & H9024C & H
9024C & H9024C & H
9024C & HII
II
I9025C9025C
9025C9025C
9025C
34
HI 2031B
Glass-body, semimicro, conic, refillable, combination pH electrode.
Use: semisolid products.
HI 1332B
Plastic-body (Ultem®), double junction, refillable, combination pH
electrode. Use: general purpose.
75 mm
2.95"
6 mm
0.25"
"S" VERSION
HI 2031
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1332
FC 100B
Plastic-body (Kynar®), double junction, refillable, combination pH
electrode. Use: general purpose for food industry.
FC 200B
Plastic-body (Kynar®), open junction, conic, Viscolene, non-refillable,
combination pH electrode. Use: meat & cheese.
120 mm
4.7"
12 mm
0.5"
FC 100
75 mm
2.95"
6 mm
0.25"
FC 200

8
SPECIFICATIONS HI 9024C & HI 9025CSPECIFICATIONS HI 9024C & HI 9025C
SPECIFICATIONS HI 9024C & HI 9025CSPECIFICATIONS HI 9024C & HI 9025C
SPECIFICATIONS HI 9024C & HI 9025C
HI 9024C HI 9025C
Range 0.00 to 14.00 pH; 0.0 to 100.0°C
— 0.0/±399.9 mV (ISE)
— ± 400/ ± 1999mV (ORP)
Resolution 0.01 pH; 0.1°C
— 0.1 mV (ISE)
— 1 mV (ORP)
Accuracy ±0.01 pH; ±0.5°C
(@20°C/68°F) — ±0.2 mV (ISE)
Typical EMC ±0.01 pH; ±0.1°C
Deviation — ±0.3 mV (ISE)
Calibration Automatic with 5 memorized standard
buffers (4.01, 6.86, 7.01, 9.18, 10.01)
Offset Calibration ±1 pH
Slope Calibration From 70 to 108%
Temperature Automatic or manual from 0 to 100°C
Compensation (32 to 212°F)
Electrode HI 1230B pH electrode (included)
Temperature Probe HI 7669/2W (included)
Input Impedance 1012 Ohm
Battery Type & Life 4x1.5V, AA size (alkaline batteries)
approx. 400 hours of continuous use
auto-shut off after 10 minutes of non-use
Environment 0 to 50°C (32 to 122°F); 100% RH
Dimensions meter: 196x80x60 mm (7.7x3.1x2.4")
kit: 340x230x80 mm (13.8x9x3.1")
Weight meter: 425 g (15 oz.)
kit: 1.3 Kg (3.0 lb.)
33
HI 1083B
Glass-body, micro, Viscolene, non-refillable, combination pH elec-
trode. Use: biotechnology, micro titration.
HI 1131B
Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.
120 mm
4.7"
12 mm
0.5" 5 mm
0.2" 3 mm
0.12" 3.0 mm DI
A
0.12"
HI 1083
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
"S" VERSION
HI 1131
HI 1330B
Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: laboratory, vials.
HI 1331B
Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: flasks.
HI 1230B
Plastic-body (Ultem®), double junction, gel-filled, combination pH
electrode. Use: general, field.
120 mm
4.7"
5mm
0.2"
5mm DIA
0.2"
"S" VERSION
HI 1330
210 mm
8.25"
8 mm
0.3" 7.5mm DIA
0.29"
"S" VERSION
HI 1331
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1230

9
1) Battery cover
2) BNC electrode connector
3) Offset calibration trimmer
4) Slope calibration trimmer
5) Temperature setting trimmer
6) Mode indicator
7) Liquid Crystal Display
8) ON/OFF key to turn the meter on or off
9) pH/°C SET key to select pH measurement or for manual
temperature setting
RANGE
0.00 TO 14.00 pH
ACCURACY
±0.02pH
pH METER
pH
pH
°C
SET
HI 9110
67
8
9
2
13
4
5
Foodcare
ON
OFF
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION HH
HH
HII
II
I91109110
91109110
9110
32
REFILL ELECTROLYTE SOLUTIONS IN FDA APPROVED
BOTTLES
HI 8071 3.5M KCl + AgCl Electrolyte, 4x50mL, for single junc-
tion electrodes
HI 8072 1M KNO3Electrolyte, 4x50 mL
HI 8082 3.5M KCl Electrolyte, 4x50 mL, for double junction
electrodes
ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing Pretreatment Solution, 460 mL
HI 7092L Oxidizing Pretreatment Solution, 460 mL
pH & ORP ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC
connector and 1 m (3.3') cable, as shown below:
HI 1043B
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI 1053B
Glass-body, triple ceramic, conic shape, refillable, combination pH
electrode. Use: emulsions.
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
"S" VERSION
HI 1043
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1053

10
1) Battery cover
2) Electrode connector (BNC for HI 9210 and DIN for HI 9210N)
3) Offset calibration trimmer
4) Slope calibration trimmer
5) Temperature setting trimmer (HI 9210) or Temperature
Calibration (HI 9210N)
6) Mode indicator
7) Liquid Crystal Display
8) ON/OFF key to turn the meter on or off
9) RANGE key to visualize the temperature (HI 9210N) or for
manual temperature setting (HI 9210)
HI 9210N
ATC
pH METER
ON/OFF
RANGE
RANGE
pH:
°C: 0.00 - 14.00 0.0 -70.0
pH
67
8
9
2
13
4
5
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
HH
HH
HII
II
I9210 & HI 9210N9210 & HI 9210N
9210 & HI 9210N9210 & HI 9210N
9210 & HI 9210N
31
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 Buffer Sachets, 20mL, 25 pcs
HI 70007P pH 7.01 Buffer Sachets, 20mL, 25 pcs
HI 70010P pH 10.01 Buffer Sachets, 20mL, 25 pcs
HI 7004L pH 4.01 Buffer Solution, 460 mL
HI 7006L pH 6.86 Buffer Solution, 460 mL
HI 7007L pH 7.01 Buffer Solution, 460 mL
HI 7009L pH 9.18 Buffer Solution, 460 mL
HI 7010L pH 10.01 Buffer Sol., 460 mL
pH CALIBRATION SOLUTIONS IN FDA APPROVED
BOTTLE
HI 8004L pH 4.01 Buffer Solution, 460 mL
HI 8006L pH 6.86 Buffer Solution, 460 mL
HI 8007L pH 7.01 Buffer Solution, 460 mL
HI 8009L pH 9.18 Buffer Solution, 460 mL
HI 8010L pH 10.01 Buffer Solution, 460 mL
ELECTRODE STORAGE SOLUTION
HI 70300L Storage Solution, 460 mL
HI 80300L Storage Solution in a FDA approved bottle, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P Electrode Rinse Sachets, 20 mL, 25 pcs
HI 7061L General Cleaning Sol., 460 mL
HI 7073L Protein Cleaning Sol., 460mL
HI 7074L Inorganic Cleaning Sol., 460mL
HI 7077L Oil & Fat Cleaning Sol.,460 mL
ELECTRODE CLEANING SOLUTIONS IN FDA
APPROVED BOTTLES
HI 8061L General Cleaning Solution, 460 mL
HI 8073L Protein Cleaning Solution, 230 mL
HI 8077L Oil & Fat Cleaning Solution, 460mL
REFILL ELECTROLYTE SOLUTIONS
HI 7071 3.5M KCl + AgCl Electrolyte, 4x50mL, for single junc-
tion electrodes
HI 7072 1M KNO3Electrolyte, 4x50 mL
HI 7082 3.5M KCl Electrolyte, 4x50 mL, for double junction
electrodes