4-20mA output signal proportional to level by variablepitch339


Non-Contact Ultrasonic Level Transmitter

• Two ranges (20 feet and 33 feet) • 1 inch or 2 inch threaded mount • Simple calibration using magnet • Automatic temperature compensation • Low-voltage AC/DC power • 4-20mA output signal proportional to level • Relay output
LEVELTEK has been designed specifically for use in many industrial applications where economical liquid level measurement is needed. It satisfies the requirement for simple linear level measurement where an analog signal or relay is required. The non-contact level transmitter is an integral unit with a tough NEMA 6 (IP68) polypropylene housing mounted above the liquid, reducing the potential for damage and costly downtime. Ultrasonic pulses transmitted from the transmitter face are reflected from the surface of the liquid and received back by the same transmitter. A measurement of the delta time between the transmitted and received signals enables the microprocessor controlled electronics to calculate the level and provide a proportional 4-20mA output. The LEVELTEK mounts either directly to the vessel or on a suitable bracket above the liquid surface. Programming of the unit is easily accomplished using the "touch magnet" provided. Thermo also manufactures a comprehensive range of non-intrusive portable and dedicated ultrasonic flowmeters for liquid flow measurement in full and partially filled pipes. Models are available for water and wastewater management, sewage treatment, acids, oilfield applications, petroleum products, ultrapure liquids and deionized water. For further information, please contact the factory or your local representative.

Specifications: (Established at reference conditions) Range: Resolution: Repeatability: Operating Temperature: Ultrasonic Cone: Current Output: Relay Output: Damping: Supply Voltage: Operating Pressure: Weatherproof: Materials of Construction: Mounting Thread: Electrical Connection: Weight: 20 ft. (6m) and 33 ft. (10m) Better than 0.080 in. (2mm) ±0.2% of measuring distance or ±1mm -10° to +140°F (-30° to +60°C) ±5° 4-20mA (600Ω galvanically isolated) SPST (NO) 0.5 AMP, 30 VDC or SPST (NO) 0.5 AMP, 28 VAC Site adjustable 10, 30, 60 seconds 10.5 - 40 VDC; 10.5 - 28 VAC < 43 psig IP68 (NEMA 6) Polypropylene 20 ft. - 1 in. BSP and 2 in. NPT 33 ft. - 1 in. BSP (only) Supplied with 10 ft. (3m) cable (standard) 2.6 lbs. (1.2kg)



Represented by:

1410 Gillingham Lane Sugar Land, Texas 77478 USA Tel. (713) 272-0404 Fax (713) 272-4573 www.thermo.com
Thermo Electron reserves the right to alter specifications without notice.
Issue: TPS.Leveltek.00/July 2002

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