1. Overview - What These Devices Are:

️· Type: Ultrasonic Level/Interface Transmitters (specifically, models 335, 344/345, and 355). These devices use ultrasonic waves to measure the level of liquids or interfaces (boundaries between liquids) in tanks and vessels.
️· Application: Primarily designed for industrial applications, including chemical processing, water/wastewater, food & beverage, and power generation.
️· Key Benefit: Non-contact measurement - no need to submerge a sensor in the process liquid, reducing maintenance and eliminating potential contamination.

2. Model-Specific Features and Specifications (See below for a table summarizing this)

3. General Features Across Models:

️· Temperature Compensation: Automatic temperature compensation to ensure accurate measurements despite temperature fluctuations.
️· Multiple Output Options: Options include 4-20mA isolated output and HART communication (model 355).
️· Fail-Safe Options: Programmable fail-safe features (holding last known value or going to a defined output) in case of sensor failure.
️· Easy Configuration: Many models offer front-panel keypads and alphanumeric displays for easy setup and parameter adjustment.
️· Echo Rejection: Techniques to filter out unwanted echoes (like from tank obstructions).
- Model 355 has a patent-pending "Temperature Compensated Echo Rejection" which constantly adjusts based on temperature.
️· Enclosure Options: Available in various materials like cast aluminum and Lexan for different environmental conditions.

4. Table of Model-Specific Information:

Feature	Model 335	Model 344/345	Model 355
Frequency	60 kHz	38 kHz (344) / 50 kHz (345)	60 kHz
Output	4-20mA	4-20mA, RS-232	4-20mA (HART)
Power Supply	16-36 VDC	120/240 VAC, 24 VDC	16-36 VDC
Echo Rejection	Standard	Standard	Temperature Compensated
Display	LCD	Alphanumeric LCD	2-line x 16 character LCD
Max. Range	20 feet (6 meters)	N/A	Not specified in document
Key Features	Automatic self-test, selectable damping	Dual flow totalizers, stored tank shapes	HART communication, temperature compensation

5. Contact Information:

️· Corporate Headquarters: 5300 Belmont Road, Downers Grove, IL 06515, USA. Phone: 630-969-4000.
️· European Headquarters: Heikensstraat 6, 9240 Zele, Belgium.
️· Other Locations: Listings for Brazil, Canada, China, Germany, Dubai, India, Italy, Singapore, and the United Kingdom.
️· Website: www.magnetrol.com
️· Email: info@magnetrol.com

6. Trademarks:

️· Echotel [®] Magnetrol [®] (logo)
️· Kynar [®] (a trademark of The Pennwalt Corporation)