Halogen Moisture Analyzer

What is the Halogen Moisture Analyzer?

A halogen moisture analyzer combines a precision balance with a halogen heating lamp to dry a sample and calculate moisture content from weight loss. It gives results in 3–10 minutes and is suited to routine loss-on-drying checks of powders, granules, pastes and foods.

Overview

The halogen moisture analyzer places a weighed sample of 0.5–50 g under a halogen lamp that heats to 50–200 °C, with temperature control by a thermal sensor. The balance records mass continuously, and the analyzer stops when the loss rate falls below a set criterion, then reports moisture, dry matter or regain percentage. Readability of 1 mg is typical, with repeatability of ±0.05% for 10 g samples. Programs can be saved for different materials, including profiles with ramped or stepped heating to avoid crusting or decomposition. Compared with oven drying, which takes hours, it gives comparable results in minutes, but it measures all volatiles rather than water specifically and is unsuitable for materials that decompose or oxidize on heating. Reports can be printed or exported with balance calibration records for GMP work.

How does it work?

Analytical analyzers combine a sample handling stage, a selective sensor or measurement principle and a data system that converts the raw signal to a reported value. Examples include thermogravimetric drying with a balance for moisture, coulometric or volumetric titration for water, catalytic oxidation with infrared detection for organic carbon, light scattering for particle size and ion-selective electrodes for electrochemical parameters. Each design is optimized for one analyte class and sample matrix, which improves speed, repeatability and ease of use over general-purpose instruments. Calibration against certified reference materials links the output to SI units. Automation such as autosamplers, dosing units and validated software methods reduces operator variation. Results are stored with audit trails so that measurements can be traced to instrument, method and operator during regulatory inspection.

What are the key features?

• Halogen heating reaches set temperature within one minute for fast drying.
• Integrated balance with 1 mg readability records the full drying curve.
• Standard, rapid, step and gentle drying programs suit different materials.
• Automatic end-point criterion removes subjectivity from drying time.
• Stored methods and reports with date, time and user identification.
• Adjustable draft shield and sample pan handler improve repeatability.

What are the technical specifications?

A typical halogen moisture analyzer configuration offers sample weight range of 0.5–120 g, balance readability of 1 mg (0.001 g), moisture readability of 0.01%, repeatability (10 g sample) of ±0.05%, heating temperature range of 50–200 °C and heating source of Halogen lamp, 400 W. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Halogen Moisture Analyzer is used in food and grain moisture testing, pharmaceutical granule loss on drying, plastic and polymer pellet moisture and chemical powder moisture checks. Across the wider Analytical Analyzers class, laboratories also deploy it for pharmaceutical and API quality control, food and beverage composition testing and chemical and polymer characterization.

Which standards and certifications apply?

Relevant standards and methods include USP <921>, USP <643>, Ph. Eur. 2.5.12, ISO 760, ISO 13320, ASTM E203, ASTM D7573 and GB/T 6283. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Install analyzers on stable benches with controlled temperature and humidity, away from drafts and vibration. Follow manufacturer requirements for gases, reagents, waste handling and ventilation. Calibrate and verify routinely using certified reference materials relevant to the matrix, and schedule preventive maintenance for consumables such as electrodes, lamps, catalysts and dispersion units. Validate methods for accuracy, repeatability and linearity before release testing, and record them under a quality system such as ISO 17025 or GMP. Use software with user levels, audit trail and electronic signatures where regulated. Provide training for sample preparation, because sampling error is usually the largest contributor to measurement uncertainty.

How do I select the right Halogen Moisture Analyzer?

Select the halogen moisture analyzer for fast routine loss-on-drying tests where total volatile content is the defined parameter and materials are stable when heated. Choose Karl Fischer instead for specific water determination at trace levels. In an RFQ, specify sample weight range, balance readability, maximum temperature, heating source and GMP data features.

How does it compare with other Analytical Analyzers variants?

Start from the measurand and the sample matrix. Determine the required concentration range, accuracy, sample throughput and regulatory method, then select the analyzer type that natively meets them. For water in solids and liquids at ppm levels, a Karl Fischer titrator is the reference, while a halogen moisture analyzer suits fast loss-on-drying checks above 0.1%. TOC analyzers should be matched to the expected range and the presence of particulates or salts. Laser diffraction covers 0.01 to 3500 µm for dry or wet dispersions. Benchtop multiparameter analyzers suit labs measuring pH, conductivity and dissolved oxygen together. Also consider sample preparation needs, consumables, software compliance, automation level and local service support.