Ultrasonic Level Sensor for Tanks

Ultrasonic Level Meter Overview

HL Ultrasonic level meter is non contact liquid level sensor for liquids and solids level measurement. Ultrasonic sensor consists of probe and host, both of which are plastic leak-proof structure. The HL series ultrasonic sensor for level measurement can be widely applied to the metallurgical, chemical, electricity and oil industries. It can work as ultrasonic fuel level sensor, ultrasonic oil tank level sensor, and ultrasonic water tank level meter.etc.

We are a China ultrasonic level sensor supplier, our ultrasonic level sensor is provided with digital display to indicate level and easy configuration. The ultrasonic level indicator can be integrated with the ultrasonic sensor, or separated with the level sensor. It not only works as ultrasonic liquid level sensor, it can be used as ultrasonic level sensor for tanks. Please specify the medium and level range when buy ultrasonic level sensor.

Principle of Ultrasonic Level Meter

The sensor of the ultrasonic liquid level meter pulses in the direction of the product surface. There, they are reflected back and received by the level sensor. The ultrasonic level sensor measures the time t between pulse transmission and reception. The ultrasonic level meter uses the time t (and the velocity of sound c) to calculate the distance D between the sensor membrane and the product surface: d = c •t/2. As the device knows the installation height H from a user entry, it can calculate the level as follows: L = H – D .

B: blacking distance D: distance value L: level value H: installation height F: full span value L=H-D

An integrated temperature sensor compensates for changes in the velocity of sound caused by temperature changes. Calibration Enter the empty distance H and the span F to calibrate the device.

Blanking distance for ultrasonic level sensor: Span F may not extend into the blanking distance B.  Level echo from the blanking distance cannot be evaluated due to the transient characteristics of the sensor.

HL Series Ultrasonic Level Meter Technical Specifications

Level Range: 0-4m, Blank distance : 0.20m 0-6m, Blank distance : 0.25m 0-8m, Blank distance : 0.30m 0-12m, Blank distance : 0.50m 0-20m, Blank distance : 0.80m 0-30m, Blank distance : 1.20m 0-40m,Blank distance : 1.5 m Accuracy:   0.2% of span Output:  4-20mA Output Load:  0-500Ω

Display:   4 Digits LCD(All types have displays) Temperature compensations:  Automatic Pressure Rating:   0.1Mpa Cable Gland:   PG13.5 Beam Angle:   8°, 5°(3db) LevelSensor Material:   ABS &PVC or PTFE Protection level:   IP67 Installation:  Thread, Flange, Bracket Parameter setting: 3 Induction buttons Temperature Range : -40 ~75℃,HLT1 -20 ~75℃ Sampling time:  1second (adjustable)

Ultrasonic Level Meter Types

Type	HLT, 2-wire,	HLN,3-wire	HLU,4-wire,	HLT1,2-wire*2
Construction	Compact	Compact	Compact	Compact
Power	DC20-32V, ≥30mA	DC20-32V, ≥60mA	DC20-32V,≥60mA；AC85-265V≥ 50mA	DC21-27V,≥ 35mA
Explosion Proof	No			Yes,Exia IICT6
Housing Material	ABS or Aluminum			Aluminum
Relay	No		2  (High &Low)*1	NO
Display	With integral ultrasonic level indicator

Type	HLR,RS485,	HLF Standard	HLM Functions
Construction	Compact	Remote	Remote
Power	DC24(±10%),≥ 60mA	DC24(±10%),0.1A;AC85-265V,≥ 50mA
Housing Material	ABS or Aluminum	ABS	ABS
Relay	No	2  (High &Low) *1	2,4,6 Relays
Communication	RS485,Modbus	RS485 option	RS485/Hart
Display	With integral display	With Remote Display

*1 Relay output specifications: 5V 250VAC/30VDC

*2 HLT1 Ultrasonic level sensor only have 0-4m and 0-8m level range.

Ultrasonic level sensor Model Selections

Item	Code	Specifications
General	HL	HL Ultrasonic Level meter
Types	T	2-wire series, compact version  levelsensor
	N	3-wire series, compact version  levelsensor
	R	RS485 series, compact version  levelsensor
	U	4-wire series, compact version  levelsensor
	T1	ExiaIICT6 ,2-wire series, intrinsically safe explosion-proof
	F	Standard series, remote version, standard 10m cable
	M	Multi-functional series, remote version, standard 10m cable
LevelRange	04	0-4m
	06	0-6m
	08	0-8m
	12	0-12m
	20	0-20m
	30	0-30m
	40	0-40m
Housing Colors &Material	P	Plastic（all）
	G	Aluminum, green color（only for HLT, HLN, HLR series）
	B	Aluminum, blue color（for all compact series except HLR series）
	K	Aluminum, blue & gray（only for HLT series）
	V	Aluminum, white（only for HLT series）
Wet part Material	S	ABS&PVC ((Simple anti-corrosion)
	F	PTFE（Strict anti-corrosion）
Process connection	1	G1½ screw (only for the range less than 6m)
	2	G2 screw (only for the range less than 8m)
	3	DN50 flange (only for the range less than 6m)
	4	DN65 flange (only for the range less than 8m）
	5	DN80 flange (only for the range less than 12m）
	6	DN100 flange(all)
	7	DN150 flange(all）
	8	DN200 flange(all）
Output	C0	4-20mA(All)
	C2	RS485-Modbus protocol(only for HLR and remote series)
	C3	RS485-Profibus-DP protocol(only for HLM series)
	C4	Hart protocol (only for HLU，HLM series)
Switch Output	0	None
	2	2 SPDT (only for HLU HLF HLM HLG series)
	4	4 SPDT(only for HLM series）
	6	6 SPDT (only for HLM series）
Power supply	D	DC24V
	A	AC220V