Soap Moisture

Quality Tied to Moisture Content

The moisture content of soap noodles varies based on the specific qualities desired in the soap bar. Implementing online moisture measurement at the exit of the spray dryer/pelletizer offers instant feedback on moisture levels, facilitating quicker process optimization during start-up, cost savings through improved drier efficiency, and ensuring a consistently high-quality product. The IR3000 by MoistTech is an industrial-grade moisture analyzer tailored for seamless integration into factory environments, such as soap manufacturing. Being a non-contact moisture measurement device, the IR3000 provides companies with the ability to accurately measure moisture levels even in difficult operating conditions.

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Production Process

Soap is produced through a chemical reaction called saponification, which involves combining fats, oils, or fatty acids with water-soluble bases. Common fats used include beef or mutton tallow, coconut, and palm kernel. The fats or oils are treated to remove impurities and enhance color or scent before undergoing saponification either continuously or in batches. This process yields liquid soap, also known as neat soap, along with glycerin as a by-product. The glycerin is extracted and purified, while the liquid soap is dried in a vacuum spray drier before being formed into pellets using a pelletizer. These soap noodles are then stored in bins until they are transformed into bar soap.

Soap Flakes & Soap Powder

One of the most important aspects of creating high quality soap flakes is optimizing moisture content. If moisture is not kept at the right levels during the production process, the product quality becomes inferior, which leads to waste and losses in profits. Measuring soap flake moisture is easy with MoistTech’s state-of-the-art technology.

The IR-3000 measures moisture in % dry and % wet by taking instant non-contact readings. Temperature, chemical composition, and other levels vital to soap flake production and processing are also measured with accuracy.

To accurately measure the detergent moisture levels, the sensor should be installed over the conveyor transporting the detergent. The sensor should be mounted several inches above the belt, screw conveyor or any area where the material can be viewed.


Our equipment never comes into contact with the product, allowing for less waste

zero drift

Our sensors are guaranteed not to drift over time – which saves time and money

closed loop

Create a closed-loop process by tying a moisture sensor into your PLC. Full control over the line!

no recalibrations

We’ve mastered the art of moisture sensors – your unit will never need to be recalibrated for the same product twice!

Gauge Installation

The IR3000 enables moisture measurement to be conducted at the pelletizer’s exit. The 4-20 mA or optional output can be utilized to regulate steam pressure in the heat exchanger, thereby impacting the moisture level of the pellets. MoistTech suggests installing the gauge at a 20º angle relative to the horizontal position in order to reduce specular reflection. In cases where the exit chute is enclosed, the product can be observed either through a viewing window or an insertion probe.

Installation at the exit of pelletizer is ideal


We offer service and support throughout the world for our moisture measurement sensors and would be happy to connect you with a rep in your area. Contact us today for more information!

Understand the Process

With our advanced moisture sensor technology installed, your factory will be able to reap the benefits immediately. Thanks to an impressive increase in product quality, you’ll maintain a satisfied customer base. You’ll also notice your production lines are more efficient and experiencing less downtime, leading to a more optimized process. Expect to see reduced waste and energy costs, too.