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Fast and Easy Karl Fischer Moisture Meter
MINIHYD KF moisture meters have been specifically designed for the determination of water content in oils. Combining coulometry with the Karl Fischer method, MINIHYD KF titrators determine the water content of samples by measuring the amount of electrolysis current necessary to produce the required iodine – this is an absolute technique which does not require the calibration of reagents. MINIHYD KF titrators have been developed in response to many requests from customers in routine laboratories, off-shore platforms and in the field. The built-in battery and optional carry case provide the versatility required by the laboratory and also the ease of use and portability required by the field engineer.
The MINIHYD KF offers many advantages over competition. Easy to use – simple to program so that only a single button needs to be pressed, everything else is automatic. Complete with a built-in high speed printer, everything in a single footprint and small space requirement. Results can also be downloaded via the Results Manager software package onto a PC spreadsheet.
Small, Fast and Accurate
MINIHYD offers a state-of-the-art solution for titration testing: The small size, the built-in-battery and the car-adapter allow for field application in addition to general laboratory use. Its advanced software makes it an outstanding performer for routine quality control and more detailed research applications. MINIHYD works with the patented ACE (Automatically Compensated Errors) control system, which guarantees bias-free results.
Results Manager
This is a windows application that allows you to view and print sets of results created by the MINIHYD KF Moisture Meter. It can download results directly from the titrator through a serial port connection, or open result files previously saved to disk. The Results Manager Software is supplied as a standard item with the MINIHYD KF.
Coulometric Reagents
Cou-Lo Formula reagents offer optimum performance with MINIHYD KF titrators. Our packaging concept has been based on advice from the HSE (Health & Safety Executive) to enable non laboratory personnel to work more safely. Cou-Lo Formula reagents are safer to use and safer to store. Each MINIHYD unit is shipped with a batch of four packets of Cou-lo Formula reagents to save you time and money.
Wide Range of Applications
Though primarily used for assessing the water content in petroleum and petrochemical products, the MINIHYD is able to measure the water content in virtually any liquid substance. Therefore the areas of application include industries such as:
* Petrochemical (oils, gasolines, solvents, fluids …)
* Power (electricity)
* Chemicals
* Gases
* Automotive
* Aviation
* Pharmaceuticals & Toiletries / Cosmetics
* Contract Laboratories
* Universities
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Fast and Easy Karl Fischer Moisture Meter
Features
- Conforms to ASTM D1533, D4928, D6304, IP386, IP438, API MPMS Chapter 10.9, IEC60814, ISO 10101-3, 10337 & 12937
- Simple operation
- 10 user programmable methods
- 1ppm / 100%
- Results in ppm, mg/kg, % & μg water
- Small footprint, fully portable
- Integral high speed printer
- Low drift cell design
- Automatically compensated errors
- Results Manager software
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Technical Data
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| Titration Method |
Coulometric Karl Fischer titration |
| Electrolysis Control |
Patented “ACE” control system |
| End Point Detection |
AC Polarization |
| End Point Indication |
Visual display/print out/acoustic beep |
| Measuring Range (possible) |
1μg - 100mg water |
| Measuring Range (typical) |
1μg - 10mg water |
| Moisture Range |
1ppm - 100% water |
| Max. Sensitivity |
0.1μg |
| Max. Titration Speed |
2.0 mg per minute |
| Max. Current |
400 ma |
| Drift Compensation |
Automatically controlled |
| Start/End Delay Time |
0-30 minutes, user selectable |
Calculation Modes
(user programmable)
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Weight/weight, (W/w)
Weight/dilution ratio, (W/K)
Volume/density, (V/SG)
Volume/volume, (V/v) |
| Display/Print Format |
μg, mg/kg, ppm, % |
| Statistics |
max, mean, min values up to 99 runs |
| Sample ID Number |
User Programmable |
| Stirrer Speed |
Microprocessor controlled |
Languages
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English, Français, Español, Portuguese, Deutsch & Magyar; user selectable |
| Calendar/Clock |
Analysis time & date print out |
| Battery Low Indicator |
Display & print out indication |
| Data Transfer |
RS232 output |
| Removable Data Storage |
XD Card |
| Data Entry |
15 key touchpad |
| Display |
40 character LCD |
| Printer |
42 character thermal |
Power Supply
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90-264V AC, 47-63 Hz
Field application: 12V DC car adapter/internal battery |
| W x H x D |
250 x 120 x 245 mm (9.8" x 4.7" x 9.6") |
| Weight |
3.5 kg (7.7 lb) |
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Precision Data
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10-100μg ± 3μg
100μg-1mg ± 5μg
above 1mg ± 0.5%
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Principle

Karl Fischer titration is simply a means to measure water content of samples. Modern instruments, such as the MINIHYD, use the coulometric principle, whereby the water present in the sample is coulometrically titrated to a predefined end point at which there is a minute excess of free iodine present. Stoichiometrically, 1 mole of water will react with 1 mole of iodine, so that 1 milligram of water is equivalent to 10.71 coulombs of electricity. Combining the coulometric technique with Karl Fischer titration, MINIHYD titrators determine the water content of the sample by measuring the amount of electrolysis current necessary to produce the required iodine. This is an absolute technique which does not require calibration of the reagents.

Using the latest pulse current technology and the patented “ACE” control system, (Patent No.GB2370641), the MINIHYD automatically selects the appropriate titration speed dependent upon the amount of water present in the sample. The titration speed is reduced as the end point is approached, and when the titration is completed, the instrument prints out and displays the results.
Continuous product development may make it necessary to change product specifications without notice.
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![]() ASTM D1533
Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration
ASTM D4928
Standard Test Methods for Water in Crude Oils by Coulometric Karl Fischer Titration
ASTM D6304
Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration
API MPMS 10.9
Standard Test Method for Water in Crude Oils by Coulometric Karl Fischer Titration
ISO 10101-3
Natural gas -- Determination of water by the Karl Fischer method -- Part 3: Coulometric procedure
ISO 12937 / IP 438
Petroleum products -- Determination of water -- Coulometric Karl Fischer titration method
IEC/EN 60814
Insulating liquids - Oil-impregnated paper and pressboard - Determination of water by automatic coulometric Karl Fischer titration
IP 386
Methods of test for petroleum and its products - Crude petroleum - Determination of water - Coulometric Karl Fischer titration method
ISO 10337
Crude petroleum - Determination of water - Coulometric Karl Fischer titration method
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