STNY-102 Automatic Pesticide Moisture Meter
The STNY-102 automatic pesticide moisture meter is designed and
manufactured according to the GB/T 1600 pesticide moisture
determination method. The detection principle is based on
electrochemical reactions and adopts the standard test method of
Karl Fischer volumetric titration for water determination. It fully
automatically determines the moisture content of pesticides and can
quickly and accurately measure the moisture content from 10ppm to
100%
Detection Principle:
The detection principle is based on electrochemical reactions,
specifically, moisture determination is carried out through the
following steps:
Preprocessing:When the Karl Fischer reagent in the electrolytic
cell of the instrument reaches equilibrium, inject the sample
containing water into it.
Reaction process:Water participates in the oxidation-reduction
reaction of iodine and sulfur dioxide, forming pyridine and methyl
sulfate pyridine, and consuming iodine. In this process, iodine is
electrolyzed and reacts with water. The consumed iodine is
electrolyzed at the anode to maintain the progress of the redox
reaction.
Endpoint determination:When the reaction consumes all the water,
the remaining Karl Fischer reagent will form a conductive liquid
between the platinum electrodes, and the titration endpoint can be
determined by measuring the conductivity. If there is a slight
change in the conductivity of the solution before and after adding
the sample to be tested, this information can also be used to
calculate the moisture content in the sample.
Technical Parameter
| Measurement range | 10ppm-100% moisture |
| Resolution | 1ppm |
| Polarization current | ± 1000 μ A |
| Minimum injection volume | 1 μ l |
| Burette | 20ml |
| Burette accuracy | 1/20000 |
| Titration control accuracy | 1 μ l |
| Electrode type | Double platinum needle electrode |
| Repeatability | ≥ 99.7% (10mg water) |
| Maximum error | <1% |
| Featured features | custom endpoint delay, titration delay; One click cleaning; Real
time display of current |
| Display screen | 4.3-inch LCD display screen |
| Usage environment | Temperature+5 ℃~+40 ℃ Humidity<80% |
| Power supply | 220V 50Hz |
| Size | 495×330×325mm |
| Weight | 4kg |
Functional Features:
●Titration system: high-precision titration system, with a minimum
nightfall of 1 μ l
●Electromagnetic valve: Imported advanced integrated
electromagnetic three-way valve reduces the dead volume inside the
valve body to the minimum, and the liquid circuit switching speed
only takes one hundredth of a second. The outlet pressure of the
electromagnetic three-way valve reaches 100kPa, so there is no need
to worry about leakage of the three-way valve even if the pipeline
is blocked.
●Current variation: Real time display of reaction cup current
variation, allowing for intuitive observation of the entire
reaction process and more accurate measurement of the sample
●Storage information: Measurement information that complies with
GLP standards and can store 200 measurement results
Printing function: It can connect to a micro printer and print
stored measurement information;
●Waste discharge function: Automated solvent and waste liquid
suction and discharge function
●Display parameters: including date, operator number, burette type,
endpoint current, etc
●Special air pump: Designed with a dedicated solvent suction pump,
it eliminates the siphon phenomenon caused by air pressure, and
stops immediately upon pressing, accurately controlling the volume
of solvent
Shandong Shengtai Instrument Co., Ltd. provides the following
quality assurance for the instruments sold to you:
----The provided instrument materials are brand new, meet national
quality standards, and have a manufacturer's certificate of
conformity;
----The materials and main components provided meet the technical
requirements specified in the technical documentation;
----The overall quality assurance period of the equipment is one
year (excluding normal wear and tear of vulnerable parts).
----We are responsible for free maintenance of any instrument
quality issues that occur during the warranty period. Due to
equipment malfunction caused by the user's responsibility, we are
responsible for repairing and charging reasonable fees.
----Lifetime discounted supply of parts for equipment, and lifetime
maintenance and repair of the entire machine.
----After the expiration of the warranty period, if the user needs
maintenance and technical services, we will only charge a cost fee.
Packing list
| Serial number | Name | Quantity | Unit |
| １ | Host | １ | Tower |
| ２ | Fuse tube | １ | Individual |
| ３ | Dual core platinum electrode | １ | Bbranch |
| ４ | Host power cord | １ | Root |
| ５ | Connecting pipes 1 and 2 (including joints) | １ | Root |
| 6 | 3 and 4 connecting pipes (including joints) | 1 | Root |
| 7 | No. 5 connecting pipe (including joint) | 1 | Root |
| 8 | No. 6 connecting pipe (including joint) | 1 | Root |
| 9 | No. 7 connecting pipe (including joint) | 1 | Root |
| 10 | No. 8 connecting pipe (including joint) | 2 | Root |
| 11 | Drying bottle kit | 4 | Set |
| 12 | Titration head | 1 | Individual |
| 13 | Stirring element | 1 | Individual |
| 14 | 10ul injection needle | 1 | Bbranch |
| 15 | 2ml syringe | 1 | Bbranch |
| 16 | 5ml syringe | 1 | Set |
| 17 | 10ml syringe | 1 | Piece |
| 18 | Measurement tube components | 1 | Piece |
| 19 | Add sample plug | 1 | Set |
| 20 | Electrode pressure ring | 1 | Set |
| 21 | Reaction cup component | 1 | Piece |
| 22 | GL45 reagent bottle cap kit | 3 | Piece |
| 23 | 500ml reagent bottle (brown) | 1 | Piece |
| 24 | 500ml reagent bottle (white) | 2 | Piece |
| 25 | User manual | 1 | Piece |
| 26 | Thermal micro printer | 1 | Tower |
| 27 | Reagent bottle rack | 1 | Set |
