Ultrasonic Level Meter
Principle ofThe sensor of the meter pulses in the direction of the product surface. There, they are reflected back and received by the sensor. The meter measures the time t between pulse transmission and reception. The 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 distanceD: distance valueL: level valueH: installation heightF: full span valueL=H-DAn 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: 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.Technical Specifications
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LevelRange: 0-4m, Blankdistance: 0.20m 0-6m, Blankdistance: 0.25m 0-8m, Blankdistance: 0.30m 0-12m, Blankdistance: 0.50m 0-20m, Blankdistance: 0.80m 0-30m, Blankdistance: 1.20m 0-40m,Blankdistance: 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 PressureRating:0.1Mpa Cable Gland:PG13.5 Beam Angle:8°, 5°(3db) SensorMaterial: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) |
Meter Types
|
Type |
HLT, 2-wire, |
HLN,3-wire |
HLU,4-wire, |
HLT1,2-wire*2 |
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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 |
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Housing Material |
ABS orAluminum |
Aluminum |
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|
Relay |
No |
2 (High &Low)*1 |
NO |
|
|
Display |
With integral display |
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Type |
HLR,RS485, |
HLF Standard |
HLM Functions |
|
Construction |
Compact |
Remote |
Remote |
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Power |
DC24(±10%),≥60mA |
DC24(±10%),0.1A;AC85-265V,≥50mA |
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|
Housing Material |
ABS orAluminum |
ABS |
ABS |
|
Relay |
No |
2 (High &Low) *1 |
2,4,6 Relays |
|
Communication |
RS485,Modbus |
RS485 option |
RS485/Hart |
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Display |
With integral display |
With Remote Display |
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*1 Relay output specifications: 5V 250VAC/30VDC*2 HLT1 only have 0-4m and 0-8m level range.
|
Type |
HLVT |
HLVT-T |
HLVR |
|
Construction |
Compact |
Compact |
Compact |
|
Power |
DC24(±10%),≥30mA |
||
|
Relay |
No |
||
|
Communication |
No |
Blue Tooth |
RS485 MODBUS RTU |
|
Display |
No display |
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Model Selections
|
Item |
Code |
Specifications |
|
General |
HL |
HL Ultrasonic Level meter |
|
Types |
T |
2-wire series, compactdisplayversion |
|
N |
3-wire series, compactdisplayversion |
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|
R |
RS485 series, compactdisplayversion |
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|
U |
4-wire series, compactdisplayversion |
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|
T1 |
ExiaIICT6,2-wire series, intrinsically safe explosion-proof |
|
|
F |
Standard series, remotedisplayversion, standard 10m cable |
|
|
M |
Multi-functional, remotedisplayversion, standard 10m cable |
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|
VT |
2-wire series, no display,24V DC,4-20Ma,cable 10m |
|
|
VT-T |
2-wire series, no display,24V DC,Bluetooth config.cable10m*1 |
|
|
VR |
4-wire,no display,RS486,modbus RTU, cable 10m *2 |
|
|
Range |
04 |
0-4m |
|
06 |
0-6m |
|
|
08 |
0-8m |
|
|
12 |
0-12m |
|
|
20 |
0-20m |
|
|
30 |
0-30m |
|
|
40 |
0-40m |
|
|
HousingColors&Material |
P |
Plastic（all） |
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G |
Aluminum, green color（only for HLT, HLN, HLR series） |
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|
B |
Aluminum, blue color（for all compact series except HLR series） |
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K |
Aluminum, blue & gray（only for HLT series） |
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|
V |
Aluminum, white（only for HLT series） |
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|
Wet part Material |
S |
ABS&PVC ((Simple anti-corrosion) |
|
F |
PTFE（Strict anti-corrosion） |
|
|
Processconnection |
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） |
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|
6 |
DN100 flange(all) |
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7 |
DN150 flange(all） |
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|
8 |
DN200 flange(all） |
|
|
Output |
C0 |
4-20mA(All) |
|
C2 |
RS485-Modbus protocol(only for HLR,HLVR 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） |
|
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Power supply |
D |
DC24V |
|
A |
AC220V |
*1HLVT-T is can be figured by blue tooth, the software is not free, consult sales for price.*2 HLVR input power supply can be DC 3.5-5V, DC9-12V,DC 20-32V option.
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