Introduction
A Dean-Stark water content tester is an instrument used to measure the water content of the petroleum products, the oils, the solvents, and the other materials by the azeotropic distillation with the Dean-Stark apparatus, and it is used in the petroleum, the chemical, the food, and the quality control industries. The Dean-Stark method measures the water content by the distillation of the sample with a water-immiscible solvent, such as the toluene or the xylene, in which the water and the solvent are distilled together and the water is separated and collected in the graduated trap, and the volume of the collected water is measured, and the water content is calculated; the Dean-Stark water content tester consists of a round-bottom flask for the sample, a condenser, a graduated receiving trap, a heating system, and a stand, and it is used for the measurement of the water content of the crude oil, the fuel oils, the lubricants, the solvents, the food products, and the other materials, following the standard test methods, such as the ASTM standards, and it is an essential instrument for the water content measurement; the Dean-Stark water content tester provides an accurate and a direct measurement of the water content. Dean-Stark water content testers are used in the petroleum industry, in the chemical industry, in the food industry, in the laboratories, and for many other applications. With their azeotropic distillation, Dean-Stark water content testers are essential for the water content measurement.
Dean Stark Water Content Tester T-DST-S2100
Dean & Stark Water Content Tester T-S210WCT
Dean & Stark Water Content Tester is designed as per ASTM D95 standard test method. It performs test for estimating water content in petroleum products and bituminous materials by distill...
Standards
ISO 760-Determination of water-Karl Fischer method (general method)
ASTM E203-Standard Test Method for Water Using Volumetric Karl Fischer Titration
USP General Chapter <921>-Water Determination
Complies with the above standards, but is not limited to them.
Features
1. Determines water content in petroleum products and bituminous materials by Dean-Stark distillation method.
2. Glass apparatus with reflux condenser and graduated receiver collects and measures separated water volume.
3. Heating mantle with temperature control provides consistent distillation rate for accurate water separation.
4. Suitable for crude oil, lubricating grease, bitumen and other samples where water is immiscible with the distillation solvent.
5. Includes glassware set, heating mantle and support stand for complete test setup according to standard method.
FAQ
Q1: What testing scenarios is this instrument mainly applied to?
A: The Dean-Stark water content tester is used in petroleum laboratories, bitumen testing facilities and third-party testing organizations to determine water content in crude oil, lubricating grease, bitumen, waxes and other petroleum products. It supports product specification verification, pipeline custody transfer and quality control where water content affects product value, handling and processing. The method is particularly useful for samples where Karl Fischer titration is interfered by sample matrix components.
Q2: What standards does the instrument comply with?
A: The test method follows ASTM D95 for water in petroleum products and bituminous materials by distillation, ISO 3733 for petroleum products water content determination, and the corresponding GB/T 260 method. The glassware dimensions comply with the standard specification, and the heating mantle complies with relevant laboratory electrical safety standards.
Q3: What is the warranty period for the whole machine and key components?
A: The heating mantle and controller are covered by a 12-month warranty. Glassware is a consumable and not covered against breakage. Solvent and receiver cleaning supplies are also consumables. Damage from improper heating rate or glassware mishandling is excluded.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained laboratory personnel familiar with the Dean-Stark technique and solvent handling. We provide an operation manual and remote guidance. Proper solvent selection, distillation rate control and safety precautions for flammable solvents should be followed carefully.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: The graduated receiver should be verified for volume accuracy periodically, typically annually for accredited laboratories. The heating mantle temperature can be checked against a reference thermometer. No routine metrological calibration is required for the glass apparatus beyond receiver verification.
Q7: Are supporting consumables universal?
A: Distillation solvent such as xylene or toluene is available from chemical suppliers. Glassware components are standard Dean-Stark apparatus dimensions and can be sourced from laboratory glassware vendors. Replacement receivers and condensers should match the standard method dimensions.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes receiver volume, flask size, mantle capacity and support stand configuration. Additional glassware sets and spare heaters can be ordered separately. Custom orders extend delivery lead-time.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the apparatus, heating mantle and stand with an operation manual. Remote setup guidance is provided. On-site installation and training are not included for standard orders but can be arranged for laboratory setup projects.
Q10: What types of samples are compatible with this equipment?
A: The tester handles petroleum products and bituminous materials that are immiscible with the distillation solvent. Samples containing volatile components other than water may interfere with the measurement. Highly viscous samples may require solvent dilution before testing. The method is not suitable for samples where water reacts with the solvent or sample matrix.
Tips: For more details, quotes and customized solutions, please contact us anytime. We’re always ready to serve you professionally.