Dinel ULM–53 Ultrasonic Level Meter

Dinel ULM–53 Ultrasonic Level Meter are compact measurement devices containing an ultrasonic transmitter and an electronic module. Using a transmitter, level meters transmit the series of ultrasonic pulses that spread towards the level surface. The transmitter recuperates reflected acoustic waves that are subsequently processed in the electronic module.

Based on the period during which the individual pulses spread towards the level and back, this period is averaged by the electronics that perform temperature compensation and subsequently a conversion to an output current 4 -20 mA, voltage 0 – 10 V, or output RS-485 Modbus.

Thanks to the contactless measuring principle ultrasonic level meters are suitable for continuous measurement or limit level sensing of liquids, wastewater, sludge, suspensions, adhesives, resins in various open and closed vessels, sumps, open channels, and drains. Use for organic solvents or substances, which contain organic solvents, should be consulted with the manufacturer.

Usability for level measurement of solid materials is limited, there is a shorter measuring range. We recommend using the level meter for such a medium to consult with the manufacturer. The setting is carried out either using two buttons or a magnetic pen or by remote setting in case of Modbus RTU output. The device is equipped with an optical indication of its state (RUN) and the setting process (STATE). It is manufactured in designs for normal (N) and explosive atmospheres (Xi).

Dinel ULM–53 Ultrasonic Level Meter Features

For continuous level measurement of liquids (even if polluted), paste and mash materials in open or closed vessels, open channels and sumps
Configuration and adjustment of min. and max. measuring range by two buttons
Current (4 … 20 mA) or voltage (0 … 10 V) output
LED state indication
Easy and quick connecting by connector
Xi version for usage in explosive areas

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Dinel ULM–53 Ultrasonic Level MeterSpecification:

Measuring range	ULM–53_–01–_	0,1 … 1 m
	ULM–53_–02–_	0,2 … 2 m
	ULM–53_–06–_	0,2 … 6 m
	ULM–53_–10–_	0,4 … 10 m
	ULM–53_–20–_	0,5 … 20 m
Supply voltage	ULM–53N–_ _–_	18 … 36 V DC
Supply voltage	ULM–53Xi–_ _ –I	18 … 30 V DC
Current supply	ULM–53N(Xi)–_ _ –I	4 … 20 mA / max. 22 mA
	ULM–53N–_ _ –U	max. 12 mA
	ULM–53N–_ _ –M	max. 20 mA
Current output	ULM–53_–_ _ –I	4 … 20 mA (limit values 3.9 … 20.5 mA)
Voltage output	ULM–53N–_ _ –U	0 … 10 V (limit values 0 … 10.2 V)
Modbus output	ULM–53N–_ _ –M	Modbus RTU protocol
Resolution	< 1 mm
Accuracy (within the total range)	ULM–53_–01 in area 0,1–0,2 m / 0,2–1,0 m	0,3 % / 0,2 %
	ULM–53_–02; –06	0,15 %
	ULM–53_–10; –20	0,2 %
Temperature error	max. 0,04% / K
Beamwidth (-3 dB)	ULM–53_–01–_; 02–_; 10–_	10°
	ULM–53_–06–_	14°
	ULM–53_–20–_	12°
Ambient temperature range	ULM–53_–01–_; 02–_; 06–_	-30 … +70°C
Ambient temperature range	ULM–53_–10–_; 20–_	-30 … +60°C
Measuring period	ULM–53_–01–_; 02–_	0,5 s
	ULM–53_–06–_; 10–_	1,2 s
	ULM–53_–20–_	5,0 s
	ULM–53_–_ _–M	adjustable via Modbus RTU
Averaging (can be modified according to agreement)	ULM–53_ – _ _–_	4 measurement 3)
Averaging (can be modified according to agreement)	ULM–53_–_ _–M	adjustable via Modbus RTU
Short time-temperature stress resistance	+90°C / 1 hod.
Max. operation overpressure (on transmission surface)	0,1 MPa
Max. internal values 2) (for the Xi version only)	Ui=30 V DC; Ii=132 mA; Pi=0,99 W; Ci=370 nF; Li=0,9 mH
Failure indication	echo failure – basic mode	3,75 mA / 0 V / Modbus RTU
	echo failure – inverse mode	22 mA / 10,5 V / Modbus RTU
	level in dead zone 4) – basic mode	22 mA / 10,5 V / Modbus RTU
	level in dead zone 4) – inverse mode	3,75 mA / 0 V / Modbus RTU
Protection class	ULM-53_-__-_-_-_- T	IP67
	ULM-53_-__-_-_- G-M, L	IP67
	ULM-53_-__-_-_- C-M, L	IP67 5)
	ULM-53_-__-_-_- B-M, L	IP68
	ULM-53_-__-_-_- H-M, L	IP68
Recommended cable	PVC 2 x 0,75 mm2 (3 x 0,5 mm2; 2 x 2 0,25 mm2)
Maximal current output load resistance	at U = 24 V DC	Rmax = 270 Ω
	at U = 22 V DC	Rmax =180 Ω
	at U = 20 V DC	Rmax = 90 Ω
Minimal voltage output load resistance	Rmin > 1 kΩ
The delay between supply power rise time and the first measurement	ULM–53_–01–_; 02–_; 06–_	5 s
	ULM–53_–10–_; 20–_	9 s
Process connection	ULM–53_–01–_	thread G ¾‘‘
	ULM–53_–02–_	thread G 1‘‘
	ULM–53_–06–_	thread G 1½‘‘
	ULM–53_–10–_	thread G 2¼‘‘
	ULM–53_–20–_	aluminum alloy flange
Weight	ULM–53_–01–_	0,20 kg
	ULM–53_–02–_	0,20 kg
	ULM–53_–06–_	0,25 kg
	ULM–53_–10–_	0,65 kg
	ULM–53_–20–_	2,80 kg