Hanna Instruments HI 9810 User manual

Instruction Manual
HI 9810
Portable
pH/EC/TDS Meter
http://www.hannainst.com This Instrument is in
Compliance with the CE Directives

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PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipment.
If noticeable damage is found, notify your Dealer.
Each meter is supplied with:
• HI 1285 combination, amplified, double-junction, gel pH elec-
trode with incorporated EC/TDS probe and built-in
temperature sensor and 1m (3.3') cable
•HI70007 pH 7.01 sachet (1 pc)
•HI70031, 1413 µS/cm sachet (1 pc)
•HI70032, 1382 ppm sachet (1 pc)
•Instruction Manual
• 9 V battery.
Note: Save all packing material until you are sure that the instrument
functions correctly. Any defective items must be returned in the
original packing together with the supplied accessories.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
HI 9810 is the most complete and versatile portable pH/EC/TDS
meters ever manufactured. Designed with utmost precision and
simplicity, this meter provides 3 kinds of measurements. The pH, EC
and TDS ranges are easily selected using a membrane keyboard on
the front panel.
The conductivity of a solution depends on the temperature and for this
reason measurements are carried out with reference to a standard
temperature of 25C. If the solution measured has a different tem-
perature than 25C, compensation must be performed.
HI 9810 automatically compensates for temperature changes with a
built-in temperature sensor and circuitry. The temperature coefficient
is fixed at 2%/C.
HI 9810 is designed for simplicity of use in taking pH, µS/cm and
mg/L measurements.
ISO 9000 Certified
Company since 1992
Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the meter.
This manual 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 need additional technical information, do not hesitate to e-mail
us at [email protected].
These instruments are in compliance with directives
EN 50081-1, EN 50082-1 and EN61010-1.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
PRELIMINARY EXAMINATION ..................................................... 3
GENERAL DESCRIPTION............................................................. 3
FUNCTIONAL DESCRIPTION ....................................................... 4
SPECIFICATIONS....................................................................... 5
OPERATIONAL GUIDE ................................................................ 6
pH CALIBRATION ..................................................................... 8
EC/TDS CALIBRATION ............................................................... 9
pH VALUES AT VARIOUS TEMPERATURES ................................. 10
TEMPERATURE COMPENSATION ............................................... 11
EC/TDS COVERSION FACTOR .................................................... 11
ELECTRODE CONDITIONING AND MAINTENANCE ......................... 12
ACCESSORIES ......................................................................... 14
BATTERY REPLACEMENT ........................................................... 16
OTHER PRODUCTS FROM HANNA ............................................ 17
WARRANTY ............................................................................ 18
CE DECLARATION OF CONFORMITY ........................................... 19

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HI 9810
Range pH 0.00 to 14.00
mg/L 0 to 3000
µS/cm 0 to 6000
Resolution pH 0.10
mg/L 10
µS/cm 10
Accuracy pH ±0.20
(@20°C/68°F) mg/L ±2% f.s.
µS/cm ±2% f.s.
Conversion Factor 1µS/cm = 0.5 mg/L
Typical EMC pH ±0.10
Deviation mg/L ±2% f.s.
µS/cm ±2% f.s.
pH Calibration Manual 1 point through
offset trimmer
Offset Calibration ±1.5 pH
EC/TDS Calibration Manual 1 point through slope trimmer
EC/TDS Temperature Automatic from 0 to 50C (32 to 122F)
Compensation with a ß of 2%/C
Electrode HI 1285 combination pH/EC/TDS
electrode with temperature sensor
and 1 m (3.3') cable (included)
Battery Type 9 Volt
150 hours of continuous use
Environment 0 to 50C (32 to 122F);
max 95% RH non-condensing
Dimensions 185 x 82 x 45 mm
(7.3 x 3.2 x 1.8")
Weight 520 g (1.1 lb.)
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
1) LCD display
2) pH range selection key
3) µS/cm (EC) range selection key
4) EC/TDS calibration knob
5) ON/OFF key
6) mg/L (TDS) selection key
7) pH offset calibration knob.

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TAKING EC/TDS MEASUREMENTS
• Immerse the tip of the electrode (4cm/1½") into the
sample to be tested. If possible, use plastic beakers
or containers to minimize any EMC interference.
• Tap the electrode lightly on the bottom of the
beaker to remove any air bubbles which may be
trapped inside the tip.
• Select the appropriate measurement range (EC or TDS).
• Wait for 1-2 minutes for the temperature sensor to attain thermal
equilibrium. The display will then show the measurement auto-
matically temperature compensated for temperature with the
appropriate indication among the following:
µS symbol indicates the meter is in
µS/cm, EC mode
- No symbol indicates the meter is in TDS
mode.
Note: If the case of an erroneous reading, the "E" indication will
appear on the right of the display.
AFTER MEASUREMENTS
After measurements have been completed, the instrument should be
switched off and the probe cleaned and covered with the protective
cap.
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with a 9V battery. Slide off the
battery compartment cover on the back of the meter (see page 16),
install the battery while paying attention to its polarity.
Connect the probe to the DIN socket on the
top of the meter by aligning the pins with
the socket and pushing in the plug.
Always remove the electrode protective cap before taking any mea-
surements.
Make sure the meter has been calibrated before taking any measure-
ments (see pages 8 and 9 for calibration
procedures).
Turn the meter on by pressing the ON/OFF key.
TAKING PH MEASUREMENTS
If the electrode has been left dry, soak the tip in a pH 7 or pH 4
buffer solution for a few minutes to reactivate it.
• To take a pH measurement simply submerge the tip
(4cm/1½") of the combination pH/EC/TDS electrode
into the sample to be tested.
• Select the pH mode .
• Shake the electrode briefly while sub-
merged and allow a couple of minutes
for the electrode to adjust and stabilize.
The display will show the pH value.
• If measurements are taken in different samples successively, it is
recommended to rinse (clean) the electrode thoroughly to elimi-
nate cross-contamination. After cleaning, it is recommended to
rinse the electrode with some of the sample to be measured.

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EC/TDSEC/TDS
EC/TDSEC/TDS
EC/TDS CALIBRATIONCALIBRATION
CALIBRATIONCALIBRATION
CALIBRATION
Accessories needed:
• Use HI 7039 or HI 8039, 5,000 µS/cm EC solution or HI
7032, 1382 ppm TDS solution.
Note: the conversion between EC and TDS is made by a built-in
circuit, hence it is requested to calibrate the meter only in EC
or TDS range. The other range is thus automatically cali-
brated.
PROCEDURE
• Pour approximately 4 cm (1½") of a con-
ductivity calibration solution (e.g. HI
7039/HI 8039) into a beaker. If pos-
sible, use plastic beakers to minimize any
EMC interference.
• Immerse the combined electrode in the solution.
• Wait for a couple of minutes for thermal equilib-
rium to be reached.
• Tap the combined electrode on the bottom, then
shake it lightly while rotating to make sure no air
bubbles remain trapped inside the probe.
• Select the appropriate range, e.g. µS/cm.
• Turn the EC/TDS calibration knob until the
display shows the EC or TDS reading at
25C.
For greatest accuracy, frequent calibration of the instrument is recom-
mended. The instrument should be recalibrated for pH:
a) Whenever the electrode is replaced.
b) At least once a month.
c) After testing aggressive chemicals.
d) Where extreme accuracy is required.
PREPARATION
Pour small quantities of pH 7.01 (HI 7007 or
HI 8007) or pH 4.01 (HI 7004 or HI 8004) or
pH 10.01 (HI 7010 or HI 8010) solution into
a clean beaker.
To obtain accurate readings, use pH 7.01 (HI 7007 or HI 8007) if
you are going to measure neutral or close to neutral samples, pH 4.01
(HI 7004 or HI 8004) if you are going to measure acidic samples
or pH 10.01 (HI 7010 or HI 8010) for alkaline measurements.
If you need to calibrate HI 9810 to NBS standards, use pH 6.86
(HI 7006 or HI 8006) instead of pH 7.01 and pH 9.18 (HI 7009
or HI 8009) instead of pH 10.01.
PROCEDURE
• Switch the meter on after connecting the electrode and press pH
to display pH measurement.
•Remove the protective cap from the electrode, rinse
and immerse it in the buffer and stir gently. Wait a
couple of minutes for the reading to stabilize.
• If the buffer solution is not at ambient temperature,
take its temperature with a ChecktempC (or an accu-
rate thermometer), e.g. 10.0C.
Note: the electrode should be submerged approximately 4 cm (1½") into the
solution. The ChecktempC should be located close to the electrode.
• Adjust the pH calibration knob until the LCD
shows the pH value at the above temperature
(see the pH versus temperature chart on
page 10).
• The pH calibration is now complete.
pp
pp
pH CALIBRATIONH CALIBRATION
H CALIBRATIONH CALIBRATION
H CALIBRATION

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The TDS value in aqueous solutions is directly proportional to conduc-
tivity. The ratio between the two parameters depends on the solution.
HI 9810 has a fixed conversion factor set to 0.5. This means that
1 µS/cm is equal to 0.5 mg/L of TDS.
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOREC/TDS CONVERSION FACTOR
EC/TDS CONVERSION FACTOR
The conductivity of an aqueous solution is the measure of its ability to
carry an electrical current by means of ionic motion.
The conductivity invariably increases with increasing temperature.
It is affected by the type and number of ions in the solution and by
the viscosity of the solution itself. Both parameters are temperature
dependent. The dependency of conductivity on temperature is ex-
pressed as a relative change per degree Celsius at a particular
temperature, commonly as percent per C.
For common ionic solution, this value is about 2%/C. Acids, alkalis
and concentrated salt solutions have somewhat lower value, typically
1.5%/C.
Since a small difference in temperature causes a large change in
conductivity, it is necessary to compensate for conductivity readings at
high and low temperature. The readings are usually normalized at
25C.
HI 9810 automatically compensates for temperature differences with
a built-in temperature sensor circuitry. With this compensation, the
display shows the readings at 25C (77F).
TEMPERATURE COMPENSATIONTEMPERATURE COMPENSATION
TEMPERATURE COMPENSATIONTEMPERATURE COMPENSATION
TEMPERATURE COMPENSATION
For temperature compensation during calibration, please refer to the
following chart.
pp
pp
pH VALUES AT VARIOUSH VALUES AT VARIOUS
H VALUES AT VARIOUSH VALUES AT VARIOUS
H VALUES AT VARIOUS
TEMPERATURESTEMPERATURES
TEMPERATURESTEMPERATURES
TEMPERATURES
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
4.11
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75
For instance, if the buffer temperature is 25C, the display should
show pH 4.00 or 7.00 or 10.00.
If the buffer temperature is 10C, the display should show pH 4.00
or 7.10 or 10.20.
If the buffer temperature is 50C, the display should show pH 4.10
or 7.00 or 9.80.

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CLEANING PROCEDURE
General Soak in Hanna HI 7061 General Cleaning Solu-
tion for approximately ½ hour.
Removal of films, dirt or deposits on the membrane/junction:
Protein Soak in Hanna HI 7073 Protein Cleaning Solu-
tion for 15 minutes.
Inorganic Soak in Hanna HI 7074 Inorganic Cleaning
Solution for 15 minutes.
Oil/grease Rinse with Hanna HI 7077 Oil and Fat Clean-
ing Solution.
IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with tap water and soak the electrode in
HI 70300 Storage Solution for at least 1 hour before taking a
measurement.
TROUBLESHOOTING
Evaluate your electrode performance on pH measurements based on
the following.
•Noise (Readings fluctuate up and down) could be due to:
- Clogged/Dirty Junction: Refer to the Cleaning Procedure
above.
•Dry Membrane/Junction: Soak in Storage Solution HI 70300
for at least 1 hour.
•Drifting: Soak the electrode tip in warm Hanna Solution HI 7082
for one hour and rinse tip with distilled water (refill with fresh
HI 7071 for single junction electrodes and HI 7082 for double
junction electrodes if necessary).
•Low Slope: Refer to the cleaning procedure above.
•No Slope: - Check the electrode for cracks in glass stem or
bulb (replace the electrode if cracks are found).
- Make sure cable and connections are not dam-
aged nor lying in a pool of water or solution.
•Slow Response/Excessive Drift: Soak the tip in Hanna Solu-
tion HI 7061 for 30 minutes, rinse thoroughly in distilled water
and then follow the Cleaning Procedure above.
Note: for field applications, it is always recommended to keep a spare
electrode handy. When anomalies are not resolved with simple
maintenance, change the electrode (and recalibrate the meter)
to see if the problem is alleviated.
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONINGELECTRODE CONDITIONING
ELECTRODE CONDITIONING
AND MAINTENANCEAND MAINTENANCE
AND MAINTENANCEAND MAINTENANCE
AND MAINTENANCE
PREPARATION
Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT.
This is normal with pH electrodes and they will disappear when rinsed
with water.
During transport tiny bubbles of air may have formed inside the glass
bulb. The pH electrode cannot function properly under these condi-
tions. These bubbles can be removed by "shaking down" the electrode
as you would do with a glass thermometer.
If the bulb and/or junction are dry, soak the electrode in HI 70300
Storage Solution for at least one hour.
TEST MEASUREMENT
Rinse the electrode tip with tap water.
Immerse the tip (bottom 4 cm / 1½") in the sample and stir gently for
approx. 30 seconds. Light tapping of the electrode on the bottom of
the beaker is sometimes necessary to eliminate air bubble trapped in
the electrode tip that could affect the EC/TDS reading.
For a faster response of the pH reading and to avoid cross contamina-
tion of the samples, rinse the electrode tip with the solution to be
tested, before taking your measurements.
STORAGE
When not in use, replace the protective cap.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for the connection to
the meter must be intact and there must be no points of broken
insulation on the cable or cracks on the electrode stem or bulb.
Connectors must be perfectly clean and dry. If any scratches or cracks
are present, replace the electrode. Rinse off any salt deposits with
water.
HI 1285 is a combined pH/EC/TDS electrode with built-in temperature sensor for EC/TDS
automatic temperature compensation. The probe screened cable is 1 m (3.3") long.

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ELECTRODE STORAGE SOLUTIONS
HI 70300M Storage Solution, 230 mL
HI 70300L Storage Solution, 460 mL
ELECTRODE STORAGE SOLUTIONS IN FDA APPROVED
BOTTLE
HI 80300M Storage Solution, 230 mL
HI 80300L Storage Solution, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P Electrode Rinsing Sachets, 25 x 20 mL
HI 7061M General Cleaning Solution, 230 mL
HI 7061L General Cleaning Solution, 460 mL
HI 7073M Protein Cleaning Solution, 230 mL
HI 7073L Protein Cleaning Solution, 460 mL
HI 7074M Inorganic Cleaning Solution, 230 mL
HI 7074L Inorganic Cleaning Solution, 460 mL
HI 7077M Oil & Fat Cleaning Solution, 230 mL
HI 7077L Oil & Fat Cleaning Solution, 460 mL
ELECTRODE CLEANING SOLUTIONS IN FDA
APPROVED BOTTLE
HI 8061M General Cleaning Solution, 230 mL
HI 8061L General Cleaning Solution, 460 mL
HI 8073M Protein Cleaning Solution, 230 mL
HI 8073L Protein Cleaning Solution, 230 mL
HI 8077M Oil & Fat Cleaning Solution, 230 mL
HI 8077L Oil & Fat Cleaning Solution, 460 mL
OTHER ACCESSORIES
CHECKTEMPC Electronic thermometer (range: -50.0 to 150.0C)
HI 710001 Soft carrying case
HI 710009 Shockproof, blue rubberboot
HI 710010 Shockproof, orange rubberboot
HI 710031 Rugged carrying case
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 70004P pH 4.01 Buffer Sachets, 25 x 20 mL
HI 7004M pH 4.01 Buffer Solution, 230 mL
HI 7004L pH 4.01 Buffer Solution, 460 mL
HI 7006M pH 6.86 Buffer Solution, 230 mL
HI 7006L pH 6.86 Buffer Solution, 460 mL
HI 70007P pH 7.01 Buffer Sachets, 25 x 20 mL
HI 7007M pH 7.01 Buffer Solution, 230 mL
HI 7007L pH 7.01 Buffer Solution, 460 mL
HI 7009M pH 9.18 Buffer Solution, 230 mL
HI 7009L pH 9.18 Buffer Solution, 460 mL
HI 70010P pH 10.01 Buffer Sachets, 25 x 20 mL
HI 7010M pH 10.01 Buffer Solution, 230 mL
HI 7010L pH 10.01 Buffer Solution, 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
CONDUCTIVITY & TDS BUFFER SOLUTIONS
HI 7031L 1413 µS/cm (µmho/cm), 460mL
HI 7031M 1413 µS/cm (µmho/cm), 230mL
HI 7033L 84 µS/cm (µmho/cm), 460 mL
HI 7033M 84 µS/cm (µmho/cm), 230 mL
HI 7032L 1382 ppm (mg/L), 460 mL
HI 7032M 1382 ppm (mg/L), , 230 mL
HI 7039L 5,000 µS/cm (µmho/cm), 460mL
HI 7039M 5,000 µS/cm (µmho/cm), 230mL
CONDUCTIVITY BUFFER SOLUTIONS IN FDA
APPROVED BOTTLES
HI 8031L 1413 µS/cm (µmho/cm), 460 mL
HI 8033L 84 µS/cm (µmho/cm), 460 mL
HI 8039L 5,000 µS/cm (µmho/cm), 460mL

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BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
All meters are powered by a 9V battery that is located on the rear of
the instrument.
When the battery becomes weak reaching a certain threshold, the
istrument automatically switches off.
Replacement must only take place in a nonhazardous area using an
alkaline 9V battery.
To access the battery, remove the battery cover by applying pressure
in the direction indicated. Replace the old battery with a new one
while paying attention to its polarity.
• CALIBRATION AND MAINTENANCE SOLUTIONS
• CHEMICAL TEST KITS
• CHLORINE METERS
• CONDUCTIVITY/TDS METERS
• DISSOLVED OXYGEN METERS
• HYGROMETERS
• ION SPECIFIC METERS (Colorimeters)
• MAGNETIC STIRRERS
• Na/NaCl METERS
• pH/ORP/Na ELECTRODES
• PROBES (DO, µS/cm, RH, T, TDS)
• PUMPS
• REAGENTS
• SOFTWARE
• THERMOMETERS
• TITRATORS
• TRANSMITTERS
• TURBIDITY METERS
• Wide Range of Accessories
Most Hanna meters are available in the following formats:
• BENCH-TOP METERS
• POCKET-SIZED METERS
• PORTABLE METERS
• PRINTING/LOGGING METERS
• PROCESS METERS (Panel and Wall-mounted)
• WATERPROOF METERS
• METERS FOR FOOD INDUSTRY
For additional information, contact your dealer or the nearest Hanna
Customer Service Center. You can also e-mail us at:
[email protected].
OTHER PRODUCTS FROM HANNAOTHER PRODUCTS FROM HANNA
OTHER PRODUCTS FROM HANNAOTHER PRODUCTS FROM HANNA
OTHER PRODUCTS FROM HANNA

19
18
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY
CE DECLARATION OF CONFORMITY
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 areas could cause unacceptable interferences to radio and
TV equipment.
The metal band at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this
metal band all the times.
The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this
glass bulb at all times.
During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by
electrostatic discharges.
Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC
performance.
To avoid electrical shock, do not use these instruments when voltages at the measurement surface
exceed 24VAC or 60VDC.
To avoid damages or burns, do not perform any measurement in microwave ovens.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
All Hanna Instruments meters are warranted 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 warranted for a period of six months. This warranty
is limited to repair or replacement free of charge.
Damages 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 depart-
ment 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., 584 Park East Drive, Woonsocket, Rhode
Island, 02895 , USA.
Hanna Instruments reserves the right to modify the design, construc-
tion and appearance of its products without advance notice.

http://www.hannainst.com
HANNA LITERATUREHANNA LITERATURE
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MAN9810R2
10/00
Hanna publishes a wide range of catalogs and handbooks for
an equally wide range of applications.
The reference literature currently covers areas such as:
• Water Treatment
• Process
• Swimming Pools
• Agriculture
• Food
• Laboratory
• Thermometry
and many others. New reference material is constantly being
added to the library.
For these and other catalogs, handbooks and leaflets, contact
your dealer or the Hanna Customer Service nearest to you. To
find the Hanna Office in your vicinity, check our home page
at www.hannainst.com.