--- title: Automatic and Manual Tensiometers description: Automatic Tensiometers and Manual Tensiometers offer varied capabilities. Depending on your testing needs you can find the right instrument. --- [![sglogo.jpg](https://www.scientificgear.com/hs-fs/file-16259015-jpg/images/SG_business/sg_logo.jpg?width=1024&height=254&name=sg_logo.jpg "sglogo.jpg")](https://www.scientificgear.com?hsLang=en-us) ### 800-998-6429 # Automatic Tensiometers and Manual Tensiometers # Surface Tension and Interfacial Tension **A WORD ABOUT OUR DUNOUY RINGS AND WILHELMY PLATES:** We specialize in manufacturing DuNouy Rings and Wilhelmy Plates. We can also repair damaged DuNouy Rings.   **A WORD ABOUT OUR REPAIR AND CALIBRATION SERVICES FOR TENSIOMETERS:** Depending on the model, we can repair and calibrate tensiometers. We specialize in the Fisher Tensiomat 20 and 21 as well as the CSC Scientific Precision and Interfacial Tensiometer. If you are not sure about your tensiometer, just ask us and we will let you know. We offer a selection of tensiometers that we think will fit your needs.  Our tensiometers perform surface tension and interfacial tension tests that meet the popular ASTM methods including:   - ASTM D971: Interfacial Tension of Oil Against Water - ASTM D1331: Solutions of Surface Acting Agents - ASTM D1417: Synthetic Rubber Lattices - ASTM D1590: Surface tension of industrial water and Industrial waste water # Manual Tensiometers we offer **CSC's Precision Tensiometer (Model # 70535000)** The Precision Tensiometer offers accurate measurements of both upward interfacial and surface tensions using the ring method, ensuring reproducible values within a margin of +/- 0.5 dynes/cm. It is specifically designed for analyzing solutions containing surface-active agents following ASTM Method D1331. Moreover, it meets the requirements outlined in ASTM Method D1417 for testing synthetic rubber lattices and is suitable for assessing the surface tension of both industrial water and wastewater as per ASTM Method D1590.   Key Features: - Manual operation - Only DuNouy ring method - Measurement range: 0-90 dynes/cm - Accuracy: +/- 0.5 dynes/cm - Measurement: apparent surface tension *(Note, this demonstration video is conducted using the 70545 Interfacial Tensiometer.  We use this video also to show how the 70535 Precision Tensiometer works. They essentially work the same.) * [![](https://embed-ssl.wistia.com/deliveries/ecab23b88646d29aec9b5a04b2ca41def9c85f70.jpg?image_play_button_size=2x&image_crop_resized=480x360&image_play_button=1&image_play_button_color=54bbffe0)](https://scientificgear.wistia.com/medias/aj4sd4zeyc?wvideo=aj4sd4zeyc) [How to Operate a Model 70545 Tensiometer (Interfacial)](https://scientificgear.wistia.com/medias/aj4sd4zeyc?wvideo=aj4sd4zeyc) **[Precision Tensiometer Brochure](https://www.scientificgear.com/hubfs/Brochures/CSC_Tensiometer_brochure.pdf?hsLang=en-us)** ![csc tensiometer brochure](https://www.scientificgear.com/hs-fs/hubfs/csc%20tensiometer%20brochure.png?width=200&height=264&name=csc%20tensiometer%20brochure.png)   **CSC's Interfacial Tensiometer (Model # 70545000)** While the Precision Tensiometer is dedicated to measuring the upward force applied to the ring, the Interfacial Tensiometer is designed to capture both upward and downward forces. Its dial is marked with graduations extending from zero in both directions, facilitating readings in either direction, and it features a dual vernier setup for precise measurement. Notably, distinct colors are used on the scales and verniers to differentiate between upward and downward forces.   Key Features: - Manual operation - Only DuNouy ring method - Measurement range: 0-90 dynes/cm - Accuracy: +/- 0.1 dynes/cm - Measurement: apparent surface tension and interfacial tension *(Note, this demonstration video is conducted using the 70545 Interfacial Tensiometer.  We use this video also to show how the 70535 Precision Tensiometer works. They essentially work the same.) * [![](https://embed-ssl.wistia.com/deliveries/ecab23b88646d29aec9b5a04b2ca41def9c85f70.jpg?image_play_button_size=2x&image_crop_resized=480x360&image_play_button=1&image_play_button_color=54bbffe0)](https://scientificgear.wistia.com/medias/aj4sd4zeyc?wvideo=aj4sd4zeyc) [How to Operate a Model 70545 Tensiometer (Interfacial)](https://scientificgear.wistia.com/medias/aj4sd4zeyc?wvideo=aj4sd4zeyc) **[Interfacial Tensiometer Brochure](https://www.scientificgear.com/hubfs/Brochures/CSC_Tensiometer_brochure.pdf?hsLang=en-us)** ![csc tensiometer brochure](https://www.scientificgear.com/hs-fs/hubfs/csc%20tensiometer%20brochure.png?width=200&height=264&name=csc%20tensiometer%20brochure.png)   # Automatic and Digital Tensiometers we offer ** DST-30 (Digital)** The DST-30 serves as a precise tensiometer, featuring a digital LCD display, ideal for measuring surface and interfacial tension. It ensures swift determination of tension values, without the need for extra calculations, and conveniently displays the measured data on its LCD screen for easy reference.   Key Features: - Manual operation - Both DuNouy ring and Wilhelmy plate method - Measurement range: 0-500 dynes/cm - Accuracy: 1.0 dynes/cm - Maximum capacity: 210g - Friendly key function and digital LCD display [![](https://embed-ssl.wistia.com/deliveries/3c4789ca7203a8ec233cd3be6235d3b3515d9ce7.jpg?image_play_button_size=2x&image_crop_resized=960x540&image_play_button=1&image_play_button_color=54bbffe0)](https://scientificgear.wistia.com/medias/9jxevmr2h2?wvideo=9jxevmr2h2) [How to Run a Test on a DST-30](https://scientificgear.wistia.com/medias/9jxevmr2h2?wvideo=9jxevmr2h2) | [![DST-30 Brochure](https://presentations-slides-prod.s3.amazonaws.com/105273/10808393/2022/05/11/aaef0a5499f9858f26fe2759c11570d1.thumb.jpg)](https://hubs.ly/Q02QN9Jh0) | ## DST-30 Brochure Click here for brochure [https://hubs.ly/Q02QN9Jh0](https://hubs.ly/Q02QN9Jh0) | | --- | --- |     **DST-60 (Automatic) One of our most popular!** The DST-60 Automatic Tensiometer streamlines operations by mitigating human errors and offers compatibility with both the ring and plate techniques. This versatile device operates independently of a computer and excels in conducting measurements for both interfacial and surface tension. Renowned for its reliability, the DST-60 is a staple tool for everyday testing needs in laboratories.   Key Features: - Automatic operation - Both DuNouy ring and Wilhelmy plate method - Measurement range: 0-1,000 dynes/cm - Maximum capacity: 250g - Accuracy: 0.1 dynes/cm - Friendly key function and digital LCD display   [![](https://embed-ssl.wistia.com/deliveries/8534d9a4c3c60e6987777c9dd51ccc6433eb763e.jpg?image_play_button_size=2x&image_crop_resized=960x540&image_play_button=1&image_play_button_color=54bbffe0)](https://scientificgear.wistia.com/medias/nutsp0q9gk?wvideo=nutsp0q9gk) [               How to Run a Test on a DST-60](https://scientificgear.wistia.com/medias/nutsp0q9gk?wvideo=nutsp0q9gk) [| ![DST-60 Brochure](https://presentations-slides-prod.s3.amazonaws.com/105273/10808393/2022/05/11/aaef0a5499f9858f26fe2759c11570d1.thumb.jpg) | ## DST-60 Brochure Click here for brochure [https://hubs.ly/Q02QN9Jh0](https://hubs.ly/Q02QN9Jh0) | | --- | --- | ](https://hubs.ly/Q02QN9Jh0)     **DCA-200 (Fully Automatic)** The DCA-200 tensiometer is designed for versatility, serving educational, quality control, and other multi-user purposes. It operates in conjunction with a laptop computer, enabling users to assess surface characteristics promptly using advanced software features. By incorporating an automatic stage controller, the device ensures meticulous control over sample stage movements, thereby boosting the precision and reliability of obtained data.   Key Features: - Advanced automatic operation - Both DuNouy ring and Wilhelmy plate method - Accuracy: 0.01 dynes/cm - Automatically records the Lamella length (DuNouy ring) - Auto close outer wall, ergonomic, user-friendly design - Able to measure density data of liquids by underwater displacement - Fully automatic measuring process (software control) - Basic supporting functions - 1) Zisman plots 2) Surface energy calc. 3) Surface tension (DuNouy Ring & Wilhelmy method) 4) Dynamic contact angle - Results data, able to export to excel - Built-in water circulator connection ports (works with any commercial water baths) - Built-in internal water circulation chamber (for use with water bath) - Displays entire measuring process in real-time - Built-in calibration functionality - Expandability: easy to add measurement options including absorption, powder wettability, CMC, and more | ![DCA-200 Brochure](https://presentations-slides-prod.s3.amazonaws.com/105273/10808393/2024/04/01/426dbc8722fec2210f03f896bbc8f8eb.thumb.jpg) | ## DCA-200 Brochure Click here for brochure [https://hubs.ly/Q02QN9SF0](https://hubs.ly/Q02QN9SF0) | | --- | --- |   If you're uncertain about the model you require, kindly click on the link below to access our Surface Tension Questionnaire. This questionnaire is tailored to gather all the necessary information upfront, streamlining the process and enabling us to offer the most suitable solution for your needs.   [Click Here For The Surface Tension Questionnaire](https://share.hsforms.com/1IxWbm_uIQZiGfxEQCLN6CQ1mgd)   If you currently possess the Tensiomat 20 or 21 and are contemplating an upgrade, we'd like to hear from you. We're pleased to offer a trade-in discount for any of our models in exchange. ### How can we help you? # We repair and calibrate many tensiometer models [![Request Tensiomat Calibration & Repair](https://no-cache.hubspot.com/cta/default/105273/aac31a82-8d43-4132-ae06-861fe0680441.png)](https://cta-redirect.hubspot.com/cta/redirect/105273/aac31a82-8d43-4132-ae06-861fe0680441) [ CSC Tensiometer Brochure here ](https://www.scientificgear.com/hubfs/Brochures/CSC_Tensiometer_brochure.pdf?hsLang=en-us) ## We can make and repair DuNouy Rings. 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