Ultrasonic level meter

ULM series

Light weight and compact, intrinsically safe and explosion-proof
ultrasonic level meter

Since this meter is light weight and compact, it can be installed and wired easily.
This model is approved as an Intrinsically safe explosion-proof device (TIIS, ATEX). This unit is used by combining a level meter housing and a proprietary relay isolator.

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The display section can be separated and mounted on another unit. Is approved for CE marking.

Features, keys | Usage, examples of use examples | Standard specifications

Features, keys

1. Approved as intrinsically safe explosion-proof
   This model has obtained Japanese explosion-proof(TIIS). (Exia�UBT5Ga/Gb)
   This model is approved as an explosion-proof device under EC rules (ATEX specifications). (II1/2GExiaIIBT5Ga/Gb)
   This series is also approved for CE marking.
   
2. Highly functional
   Sensitivity can be set, and the teaching mode and display unit can be selected by the user. This level meter identifies faulty reflections caused by obstacles.
3. Easy preset
   Making settings on this model is very easy, even if there is nothing in the tank to measure.
4. With an OLED display
   You can check the measured values without opening the lid.

Usages, use examples

• Detect and measure liquid levels continuously without contact.
• Measure corrosive and adhesive materials.
  Ex.: Monitor city water level, sewage, drain liquid, chemical agents (acids, alkalies), slurries, storage tanks, silos, etc.

Standard specifications

Level meters

Models		ULM-70Xi-02	ULM-70Xi-06
Measuring distance *1		0.15 to 2m	0.25 to 6m
Power source		18 to 30VDC
Output		Current output 4 to 20mA/DC (load resistance 270 ohms)
Ultrasonic wave frequency		120kHz	75kHz
Beam angle *2		10°	14°
Measurement precision		+-0.5%F.S.
Internal resolution		1mm	2mm
Measuring cycle		1 to 4 sec.
Allowable temperature		-30 to +60 degrees
Allowable pressure		Ambient pressure
Main housing	Material	Aluminum alloy
	Material of wave send and receive surface	PVDF
	Protection level	IP67
Connections	Dimensions	G1	G1 1/2
	Material	PP
Wiring cable		2 conductors (0.75mm2) *3
Weight		300g	400g
Explosion proof standard		�U1/2GExia�UBT5Ga/Gb

* The nominal measuring distance is determined by the static water level used as a reflector. It may be shorter in some measuring conditions
(steam, condensation, waves, powders and granulated material, etc.).
*2: The actual measuring range is determined by each measuring condition. For details, contact to our staff.
*3: You must ground the meter using a 5.5 mm2 cable.

Relay isolator

Models		IRU-420-I- (power source specification)	IRU-420-U- (power source specification)
Input signal		4 to 20mA
Output signal		4 to 20mA	0 to 10V
Power supply specifications	230V	60 to 230VAC, 50/60Hz, 85 to 230VDC (+10%)
	24V	18 to 30VAC, 50/60Hz, 18 to 40VDC (+10%)
Power consumption	230V	7VA
	24V	4W (rush current 0.8A)
Signal input voltage (terminal 5 and 6).		Typ.: 24.1VDC (0mA), min. 18VDC (20mA)
Output current (terminal 9 and 10)		4 to 20mA DC (load resistance: 750 ohm / 25mA)
Linearity		less than or equal to 0.05% (4 to 20mA)
Temperature drift		less than or equal to 0.05% / 10 dgrees
EC type test result sheet		FTZU 05 ATEX 01657X
Explosion proof standard		II(1) G[EExia]IIB/IIC, I(M2) [EExia]I
Explosion-proof parameter	Input (terminal 6 and 7)	Ui=28V DC, Ii=93mA, Pi=0.8W,　Ci≒0μF、Li≒0mH
	Input (terminal 6 and 7)	IIB：Uo=27.3V、Io=93mA、Po=0.64W、Co=0.68μF、Li=8mH
	Limiting voltage	Um=253V
Withstand voltage	Between power supply terminals	3.5kV
	Between input and output terminals	3.5kV
Ambient operating temperature		-20 to +60 degrees
Material	Housing	Polycarbonate
	Terminals	CuBe
Mounting		35mm DIN rail
Protection class		Applied IP20 / CE applied
Weight		Approx. 200g