1. Product Overview:The Rosemount 3100 series level transmitters are reliable and cost-effective ultrasonic level transmitters from Rosemount, capable of measuring level, volume, and open channel flow. They are suitable for applications in tanks, waste pits, buffer tanks, and open channel liquid flow. The main models in this series include: Rosemount 3101 (8 m), 3102/3105 (11 m). The products are equipped with a local operator display with buttons for quick and easy commissioning. They integrate temperature compensation functionality, allowing for dynamic temperature compensation after installing external sensors on the Rosemount 3100. The false echo automatic detection feature, combined with simple settings, makes the device more trustworthy.
 

　2. Product Specifications:

　3. Product Features:
The Rosemount 3100 Series ultrasonic level transmitters are packed with features that make them reliable and easy to use for non-contact liquid level measurement. Here are the standout capabilities:

Non-contact ultrasonic measurement: No moving parts, reducing maintenance and wear.

Integral LCD with push-buttons: On-site configuration is straightforward and intuitive.

Loop-powered 4–20 mA output: Standard across all models, with HART® communication on 3102 and 3105.

Advanced calculations: The 3102 and 3105 can compute volume and open channel flow, not just level.

Temperature compensation: An integral sensor adjusts for air temperature to ensure accurate readings.

Rugged construction: Available in metal or glass-filled nylon housings with PVDF wetted materials.

Signal relays: The 3102 includes two integral relays for control or alarm functions.

Remote temperature sensor option: For dynamic environments, especially with the 3102 and 3105.

Frequently Asked Questions – Rosemount 3100 Series

1. What is the measurement principle of the 3100 Series? 

The transmitter emits ultrasonic pulses toward the liquid surface. It measures the time it takes for the echo to return and calculates the distance using the speed of sound in air. Temperature compensation ensures accuracy.

2. What’s the difference between the 3101, 3102, and 3105 models?

3101: Basic level measurement with 4–20 mA output.

3102: Adds HART® communication and two signal relays.

3105: Includes advanced features like open channel flow and volume calculations.

3. Can the 3100 Series be used in hazardous areas? 

Yes, the transmitters are available with certifications for use in hazardous environments. Always verify the specific model’s certification before installation.

4. What materials are used for wetted parts? 

All models use PVDF for wetted components, offering excellent chemical resistance.

5. How is the device configured? 

Each model includes an integral LCD with push-buttons for local configuration. The 3102 and 3105 also support remote configuration via HART®.

6. Is remote temperature sensing available? 

Yes, the 3102 and 3105 support a remote temperature sensor for dynamic environments.

7. What is the maximum measurement range?

3101: Up to 5 m

3102: Up to 8 m

3105: Up to 11 m

8. What kind of output signals are supported? 

All models provide a 4–20 mA loop-powered output, with HART® communication available on the 3102 and 3105.

9. Are there built-in relays for control or alarms? 

Only the 3102 includes two integral signal relays for control or alarm functions.

10. What is the ingress protection rating? 

All models are rated IP66/IP68, suitable for harsh industrial environments.