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Series-ULT
Explosion-Proof Ultrasonic Level Transmitter, 32.8 ft, 4-20 mA Output
- 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
- Window cover allows easy viewing of display
- Fail-safe output options and diagnostic capabilities
Series-ULT
From
SGD
3,670.74
Product Overview
- Accuracy ± 0.2 %
- Blind Zone 8 in
- Compensated Temperature, Max 140 °F
- Compensated Temperature, Min -40 °F
- Display Note 6 Character LCD, Display Units: In, cm, ft, m, percent
- Display Type LCD
- Enclosure Ratings Explosion-Proof, IP66, NEMA Type 4X
- Enclosure Ratings Note 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
- Lead Resistance, Max 250 Ω at 24 Vdc max
- Materials, Wetted 303 Stainless Steel, Fluoroelastomer, PVDF
- Media Compatibility Consult Factory
- Memory Non-Volatile
- Mounting Orientation Vertical
- Operating Temperature, Max 140 °F
- Operating Temperature, Min -40 °F
- Output Detail 4-20 mA or 20-4 mA (2-wire)
- Output Signal Current
- Pressure Note 30 psi (2 bar) up to 25°C (77°C). Above 25°C (77°F), rating decreases 1.667 psi per 1°C increase
- Process Connection Size 2 in
- Process Temperature, Max 140 °F
- Process Temperature, Min -4 °F
- Programming 4 Button
- Proof Pressure Up to 30 psi
- Requires Factory Media Review true
- Resolution 0.079"
- Series ID Series-ULT
- Signal fail-safe On lost echo after 30 seconds, user selectable to 4, 20, 21, 22 mA or last signal
- Supply Power Note 18 to 28 Vdc (2-wire)
- Supply Power Type DC
- Supply Voltage 18 to 28 Vdc
- Weight 4 lb
Supported Applications
The Dwyer Series ULT is an explosion-proof ultrasonic level transmitter designed for the non-contact measurement of liquid levels. The series provides reliable monitoring in hazardous locations, featuring FM approval and CE compliance. It is specifically engineered for compatible fluids; the documentation explicitly states it is not for use with powder and bulk solids.
Operating Conditions & Performance
The Series ULT operates within an ambient temperature range of -40 to 140°F (-40 to 60°C) and a process temperature limit of -4 to 140°F (-20 to 60°C). Accuracy is specified as ±0.2% FS (full scale), with a resolution of 0.079" (2 mm). The transmitter features a blind zone under 8" (20 cm) and utilizes a beam width of 3" (7.6 cm) diameter.
Pressure limits are rated at 30 psi (2 bar) up to 25°C (77°F); above this temperature, the rating decreases by 1.667 psi per 1°C increase. The unit requires a power supply of 18-28 VDC for two-wire operation and supports a maximum loop resistance of 250 Ω at 24 VDC.
Key Performance Specifications
- Ranges: Available in 24.6' (7.5 m) or 32.8' (10 m).
- Failsafe Output: On lost echo after 30 seconds, user selectable to 4, 20, 21, 22 mA, or last signal.
- Mounting Orientation: Vertical installation required; probe must be perpendicular to the media surface and located at least 3" (7.6 cm) from tank walls.
Configuration Options
The series offers configurable process connections, conduit options, and output signal directions to accommodate specific installation requirements. The transmitter housing is weather-proof meeting NEMA 4X (IP66) standards and explosion-proof rated for Class I, Div. 1, Groups B, C, D; and Class II/III, Div. 1, Groups E, F, G.
Configuration Options
- Process Connections: Standard 2" NPT male or optional BSPT (British Standard Pipe Thread) male.
- Conduit Entries: Two 1/2" NPT female connections standard, with an M20 option available.
- Output Signals: Configurable for 4-20 mA or reverse action 20-4 mA (two-wire).
- Display and Programming: Features a 6-character LCD display accessible via a window cover, with programming controlled by four buttons. Units can be displayed in inches, cm, feet, meters, or percent.
Wetted Materials
- Sensor: PVDF (Polyvinylidene fluoride).
- Process Connection: 303 SS (Stainless Steel).
- O-ring: Fluoroelastomer.
Key Product Differences
The Series ULT is differentiated by measurement range and connection type, reflected in the model numbering system. The base models are defined as follows:
- ULT-1x Models: Provide a 24.6' (7.5 m) measurement range.
- ULT-2x Models: Provide a 32.8' (10 m) measurement range.
The second digit in the model code indicates the process and conduit configuration: "1" denotes a 2" NPT male process connection with two 1/2" NPT female conduits, while "2" denotes a 2" BSPT male process connection with M20 conduit entries. The series supports non-volatile memory to retain settings.
PDFs & Manuals
