Key Specifications

Measurement Principle 

Ultrasonic, time-of-flight

Measuring Range 

26 ft (8 m) for Rosemount 3101
36 ft (11 m) for Rosemount 3102 and 3105

Accuracy 
(under reference conditions *)  

Rosemount 3101:
± 0.2 in. (5 mm) for <3.3 ft (1 m), 
± 0.5% of measured distance for >3.3 ft (1 m)
Rosemount 3102 and 3105:
± 0.1 in. (2.5 mm) <3.3 ft (1 m), 
±0.25% of measured distance for >3.3 ft (1 m)

Level Resolution

Better than 0.04 in. (1 mm)

Blanking Distance 

12 in. (0.3 m)

Display

Standard 4 ⁄ 5 digit display for configuration purposes

Output 

4-20mA for 3101 
4-20mA with superimposed digital HART® communication for 3102 and 3105

Output Variables

Level for 3101 
Level, distance, volume, or open channel flow for 3102 and 3105

Configuration Tools
(for 3102 and 3105 only)

AMS, Field Communicator, Rosemount 3490 Series Universal Controller, or any other DD- or EDDL-compatible host

Enclosure (Body and Cover) Material 

Polyurethane-covered die-cast aluminum or 
Engineered polymer (glass-filled nylon) housing

Wet-side Material

PVDF

Ingress Protection

NEMA 4X, IP66 for aluminum housing 
(requires a suitably rated cable gland/blanking plug – not supplied)

IP 66/67 for glass-filled nylon housing 
(when using the supplied cable gland/blanking plug)

Hazardous Location Approvals
(for 3105 only)

Intrinsic Safety (ATEX, CSA, IECEx, and FM)

Full Specification

Refer to the Product Data Sheet (PDF @ 620KB)

* Temperature: 68 °F (20 °C), Pressure: 1013 mbar (atmospheric pressure), Relative Humidity: 50%, calm and stable water surface.