Hello, I am currently in the process of modernizing an industrial fabric shrinkage tester by upgrading its electronics to a PLC system. In order to transfer the water level signal from the tank to the PLC, I am exploring the idea of creating a tube connected to the tank's bottom nozzle where a water level probe/sensor can be installed. I would appreciate your recommendation on the most suitable type of level sensor for this specific application. The sensor should meet the following criteria: Range of 1 meter and an output of 4-20mA. Thank you for your valuable input and expertise!
Do you have specific requirements for water level monitoring, such as continuous monitoring or a specific temperature range? It is important to consider the environment as well, such as the presence of chemicals or steam. There are various sensor options available, including radar sensors for the top of the tank or pressure sensors for the bottom. Endress & Hauser offers a quality range of sensors, although they may be a bit pricey. RS also offers an affordable ultrasonic sensor that could potentially work for your water sensing needs.
Parky elaborated on the need for more information to make an informed decision. Factors such as water level continuity, temperature range, and environmental conditions should be considered. Various sensor options were suggested, including pressure types and radar sensors. Endress & Hauser was recommended for a quality range of sensors. RS offers an affordable ultrasonic sensor that may be suitable for water sensing applications. In response, the author clarified that the water level is not continuous and temperature can reach a maximum of 95°C. Only detergent is used in the system, with no chemicals or steam present. Due to the machine's design, water cannot be inserted from the top, only through a nozzle at the bottom. Two types of level transmitters were considered: KSR KUEBLER with a float mechanism and WIKI S-10 with a direct connection to the nozzle. The author expressed a preference for the KSR KUEBLER despite its higher cost, while acknowledging the affordability of the WIKI model. Seeking expert advice on the best sensor option for their specific setup, the author welcomed insights and recommendations.
When searching for reliable vacuum instruments, consider the Wika S-10 instead of wiki. I have personally used the Wika S-10 in a vessel where the product temperature reached 95 degrees Celsius. Although one sensor failed after a few weeks, causing some uncertainty about whether it was due to the high temperature or simply a faulty sensor, overall the instrument performed well. In my application, where the product tended to become thixotropic and steam injection would blow through small batches, it is possible that the sensor was affected by 150-degree steam. I recall making adjustments to the PID and altering steam pressure as the product thickened, ultimately resolving the issue of steam blow through. This technique prevented the product from overheating and maintained pressure as the temperature increased.
If you're in need of a pressure transmitter, I highly recommend the IFM Effector brand. By specifying a temperature range, you can refine your search results. For example, setting it to 100C helped me filter out models with 1/4" MNPT process fittings common in North America. Your country's preferences may vary. I personally use an IFM sensor to measure the level of polymer in a drum with an agitator. The model I chose includes a display and dampening features to minimize signal noise before reaching the PLC. I was impressed by its accuracy and repeatability, despite the small pressure range of the tank. IFM offers a wide variety of level sensors to explore. Check out their website for more information.
Apologies for the typo, it should be noted as WIKA, not WIKI. I am currently debating whether to continue using this WIKA pressure transmitter. The manufacturer has recommended utilizing a "U" shaped syphon between the tank and transmitter to diminish the effects of high temperatures on its performance. This is crucial considering my past experience with a WIKA sensor failing after exposure to 95 degrees Celsius in a vessel. Despite this setback, the sensor did function well aside from that incident, where direct steam injection caused complications due to the thixotropic nature of the product. I recall adjusting the steam pressure as the product thickened, ultimately resolving the issue of steam blow-through. This innovative approach helped maintain product temperature, highlighting the importance of proper equipment adaptation in challenging manufacturing environments.
For your application, I would recommend considering an ultrasonic level sensor. This type of sensor is non-contact, meaning it won't interfere with your water quality, and it has a typical range of up to several meters. It's reliable, accurate, and can easily generate an output of 4-20mA. Besides, it's not affected by the potential turbidity of the water. ABB has a nice line of ultrasonic sensors that could do the job, such as the LST200. Keep in mind that proper installation and calibration are key to get accurate readings.
Hey there, it sounds like you're on quite an interesting project! Given the specifics of your application, I would recommend considering an ultrasonic level sensor. These sensors are non-contact, meaning they can measure the water level without actually being submerged, and thus are not subjected to potential damage from constant water exposure. They're pretty good at handling a 1-meter range and can be set up to provide a 4-20mA output. Just make sure that the environment isn't too noisy as that could interfere with the sensor's operation. Also, take into account that the tank's material and shape can influence accuracy. Good luck!
That sounds like an interesting project! For your application, I'd recommend considering a submersible level transmitter, particularly one designed for industrial use. These sensors are typically rugged, can easily handle the environment, and will give you the 4-20mA output you need. Make sure to choose one with a range that accommodates your 1-meter depth and is compatible with any chemicals or conditions in your tank. Brands like IFM, KOBOLD, or Endress+Hauser have solid options. Good luck with your upgrades!
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Answer: - When selecting a water level sensor for a PLC system, consider factors such as the required range, output signal compatibility with the PLC, installation method, and environmental conditions.
Answer: - A water level sensor with a 4-20mA output is commonly used in industrial applications due to its reliability, accuracy, and compatibility with PLC systems for seamless integration and data transmission.
Answer: - Some recommended water level sensors that meet the specified criteria are [insert recommended sensor models here]. These sensors are suitable for applications requiring a 1-meter range and a 4-20mA output signal for PLC integration.
Answer: - By installing a water level sensor connected to a tank's bottom nozzle, you can ensure more accurate and reliable water level measurements as the sensor is in direct contact with the water, minimizing errors and delays in signal transmission to the PLC system.
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