Explanation of Halogen Moisture Analyzer Technical Parameters
What do the technical parameters of a rapid halogen moisture analyzer mean? When looking for a solution in a selection guide for halogen moisture analyzers, the main parameters we should focus on include: weighing accuracy, repeatability, heating program (drying program), temperature calibration, weighing calibration, reading accuracy (moisture readability), shutdown mode (shut-off criterion), drying temperature, heating system, and other technical parameters. What do these parameters each mean?
Rapid Halogen Moisture Analyzer
(Click image to enlarge)
Rapid halogen moisture analyzers measure moisture by loss on drying and are widely used in production. Too-high or too-low moisture affects processability, service life, usability, and quality, so accurate measurement matters in food, pharmaceutical, rubber/plastics, chemical, oil, and paper industries. The oven method is widely used but slow and laborious — hence the rapid halogen moisture analyzer as its replacement.
When choosing a model, you may be unsure which fits your needs or may misread the specification sheet — missing key points, swayed by "marginal parameters," and picking an unsuitable product.
As a rapid halogen moisture analyzer expert, VicoMeter explains each specification parameter to guide your selection.
Weighing accuracy is the precision of the built-in balance. When evaluating it, understand:
Weighing accuracy (d) is the "actual scale interval" — the balance's readability, its smallest graduation, also called minimum reading precision. It is the smallest value the balance resolves, denoted "d".
Weighing accuracy (e) is the "verification scale interval" — the indicator assessed in balance verification. For most balances d < e ≤ 10d, so evaluate d together with related parameters, not d alone.
Consider both d and e. Most analyzers specify only d, not e; in that case refer to "repeatability" in the datasheet (see the Repeatability section).
VM-E01 Halogen Moisture Analyzer（0.1mg/0.0001g）
Repeatability is the most important specification — weigh it against your QC requirements:
It is the agreement of results when the same sample is tested repeatedly on one instrument.
Expressed as standard deviation (StdDev) — a statistical measure of dispersion around the mean: smaller means values cluster closer to the mean; judge it by its ratio to the mean.
Moisture measurement is relative (wet vs. dry weight), so repeatability depends on sample weight:
Rapid Halogen Moisture Analyzer
(Click image to enlarge)
Compare models at the same sample weight.
Note: specified repeatability applies only to ideal samples.
In practice, your sample's repeatability may deviate from the datasheet due to these equally important factors:
Uniform heat distribution across the sample surface
Fast, precise, repeatable heating regulation.
Cold/hot performance (first vs. subsequent measurements)
These critical factors, being qualitative rather than quantitative, are not in the datasheet but must be considered.
VM-E10 Halogen Moisture Analyzer（1mg/0.001g）
Standard heating: heats to the target temperature; suits most samples.
Fast heating: overshoots the target briefly (e.g., +40% for 3 min); for liquids or samples above 30% moisture.
Gentle heating: ramps to the target over a set time; for volatile or skin-forming samples.
Step heating: define successive target temperatures, up or down; distinguishes surface moisture from crystal water, or serves as a custom program.
Multiple heating programs help obtain reliable, fast results on certain samples; more flexibility means stronger method optimization.
VM-01S Halogen Moisture Analyzer0.0001g（0.1mg）
The smallest displayed unit (g and % moisture/dry matter). Most models offer 0.001 g and 0.01% — sufficient for most applications.
Higher readability does not improve overall performance (repeatability). But when last-digit rounding dominates the error, readability becomes limiting — typical for very-low-moisture samples where pass/fail hinges on the second decimal, e.g., plastic pellets or white sugar:
| 2 decimal places | 3 decimal places |
| 0.03% – Fail | 0.025% – Pass |
| 0.02% – Pass | 0.024% – Pass |
In short, whenever the second decimal (%MC) matters, high resolution (0.1 mg, 0.001%) is required.
%MC = (G − g) / G × 100% (G = total weight, g = dry weight). It indicates the measurable moisture range. Domestic specs often claim 0–100% (market-driven), but the true range has a lower detection limit — the minimum moisture measurable with good repeatability. Evaluate weighing accuracy, readability, and repeatability together.
VM-E20Halogen Moisture Analyzer（2mg/0.002g）
Defines when measurement ends. Common modes:
Auto: one-key start; stops by weight-loss rate (e.g., average loss < 1 mg over 60 s). Meets most needs.
Timed: stops after a set heating time, e.g., 20 min.
Manual: heats until stopped manually; the operator must stay present.
Sample-drying-based switch-off barely depends on instrument, environment, or initial conditions — auto mode is recommended.
Multiple modes let you adapt the drying method to sample type, readability, accuracy, and speed.
VM-E50 Halogen Moisture Analyzer（5mg/0.005g）
The defined application temperature — not the sample's actual temperature, which is not measured.
Drying temperature directly affects results — it is the key parameter adjusted to match the reference (oven) method. A wide range matters for diverse samples (organic/inorganic, liquid/solid). Usually settable in 1°C steps.
VM-E01A Far-Infrared Moisture Analyzer（0.1mg/0.0001g）
Calibration means testing and adjusting the instrument to match reference values. Weighing and temperature determine accuracy, so both calibrations are essential.
A precision heating-and-weighing instrument must be maintained like any precision lab instrument. Weighing directly affects repeatability and accuracy e — it is critical to final data. Weighing calibration is required when:
Recalibrate when ambient temperature changes.
Recalibrate after moving the instrument.
Recalibrate after servicing.
Recalibrate when restarting after long storage (or periodically).
VM-1S Halogen Moisture Analyzer(0.001g/1mg）
Temperature decisively affects accuracy: too low prolongs measurement or leaves moisture unevaporated; too high scorches samples or volatilizes components. Calibration is required when:
Recalibrate when ambient temperature changes.
Recalibrate when results show large errors.
Recalibrate after servicing.
Recalibrate when restarting after long storage (or periodically).
High-Efficiency Ring Halogen Lamp
The heating source and its regulation form the heating system. Loss-on-drying analyzers heat samples via absorbed infrared radiation. Common sources:
Ring halogen lamp.
Ring far-infrared dark-field heater.
Precise, fast temperature regulation — best from low-mass, fast-response halogen lamps — is the top factor; uniform heat distribution across the sample is equally vital for repeatable results. Both depend on the source, construction, and heating algorithms, which are instrument-specific — ask the manufacturer for a demonstration.
VM-5S Halogen Moisture Analyzer（0.005g/5mg）
The nominal weighing range; sometimes the maximum capacity (upper limit).
Large capacity matters little: typical samples need 3–5 g, special ones 20–30 g; over 70 g (pan + sample) virtually never occurs.
Recently Viewed Products
Copyright © Jiangsu Victor Instrument Meter Co., Ltd. All rights reserved | Sitemap | Technical Support: VicoMeter Operations Center
