ULT-21 Dwyer Ultrasonic level transmitter, 10 m (32.8′) range, explosion-proof, 2″ NPT male process connection, 1/2″ NPT conduit connection.

The Series ULT Ultrasonic Level Transmitter provides non-contact measurement of liquid levels in an explosion-proof body. It is capable of measuring up to 32.8′ (10 m) with a PVDF sensor and 4-20 mA output.

PRODUCT APPLICATIONS

• Water and wastewater
• Pulp and paper processing
• Chemical processing
• Food and beverage

• Provides reliable, accurate, and non-contact level measurement of compatible liquids
• Non-contact technology offers no moving parts to wear, jam, corrode, or get coated like contact technologies
• Mapping software makes effective measuring surface only a 3″ (76.2 mm) diameter column with no concerns of ladders, pipes, or other tank intrusions in the remaining sound cone
• FM approved explosion-proof making it ideal for use in hazardous locations
• Easy programming with 6 digit LCD display and simple menu structure
• Output range is adjustable with choices of inputting tank dimensions or by filling and emptying the tank while calibrating and it automatically and scaling to levels it senses

Service:

Compatible fluids. Not for use with powder and bulk solids.

Wetted Materials:

Sensor: PVDF; Process Connection: 303 SS; O-ring: fluoroelastomer.

Ranges:

24.6′ (7.5 m), 32.8′ (10 m).

Accuracy:

±0.2% FS.

Resolution:

0.079″ (2 mm)

Blind Zone:

Under 8″ (20 cm).

Beam Width:

3″ (7.6 cm) diameter.

Temperature Limits:

Ambient: -40 to 140°F (-40 to 60°C), Process: -4 to 140°F (-20 to 60°C).

Temperature Compensation:

-40 to 140°F (-40 to 60°C).

Pressure Limits:

30 psi (2 bar) up to 25°C (77°C). Above 25°C (77°F), rating decreases 1.667 psi per 1°C increase. See Catalog page.

Power Requirement:

18 to 28 VDC (2 wire).

Output Signal:

4 to 20 mA or 20 to 4 mA (2 wire).

Max. Loop Resistance:

250 Ω at 24 VDC.

Electrical Connections:

Screw terminal.

Conduit Connection:

1/2″ NPT female (two) or optional M20.

Process Connection:

2″ NPT male or optional BSPT.

Enclosure Rating:

Weather-proof meets NEMA 4X (IP66), explosion-proof rated Class I, Div. 1, Groups B, C, D; Class II/III, Div. 1, Groups E, F, G.

Mounting Orientation:

Vertical.

Failsafe:

On lost echo after 30 seconds, user selectable to 4, 20, 21, 22 mA or last signal.

Memory:

Non-volatile.

Display:

6 character LCD.

Units:

In, cm, ft, m, percent.

Programming:

4 button.

Weight:

4.0 lb (1.8 kg).

Compliance:

CE, FM.