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 asultrasonic 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.
