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working princple:
The 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 (and the velocity of sound) 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
An integrated temperature sensor compensates for changes in velocity of sound caused by temperature changes.
power supply:
DC24V ±5%: For four-wire system, and the power supply current should not be less than 80mA.
AC85~265V:Only for four-wire system and the remote version series, and the power supply current should not be less than 50mA
Four-wire system: Either the power supply or signal output (4-20mA) uses one separate current loop. Their advantages are strong transmitting power and high and low relay output, and it has some advanced function.
(plastic shell)HBLU-P Integrated 4-wire Ultrasonic Level Sensor
Technical parameters:
| Measuring range: | HBLU-P4:0.2~4m HBLU-P6:0.25~6m |
| HBLU-P8:0.3~8m HBLU-P12:0.4~12m | |
| HBLU-P15:0.6~15m HBLU-P20:1.2~20m | |
| HBLU-P30:1.4~30m HBLU-P15:1.6~40m | |
| Accurancy: | 0.2% full span (in air) |
| Output signal: | 4~20mADC or with HART |
| Output load: | 0~500Ω |
| Relayes: | 2 relayes (high and low); 5A 250VAC/30VDC |
| Mode of indication: | 4 digital LCD |
| Power supply: | DC20 ~32V ≥60mA or AC85~265V ≥50mA |
| Temperature range: | -40~80°C |
| Temperature compensation: | the whole range |
| Pressure range: | ±0.1MPa |
| Cable fix: | PG13.5 |
| Beam angle: | 8° (3db) |
| Detection cylce: | 1 second |
| Parameter set up: | 3 induction buttons |
| Material of shell: | ABS |
| Material of sensor: | PVC or PTFE |
| Protection class: | IP67 |
| Installation: | thread(G2");flange |
Continuous non-contact level measurement with compact version;
Integrated design, installed conveniently;Protected in the excessive voltage and current , protected in the thunder and lightning;The big show window of LCD is easy to debug and observe;Excellent anti-interference capability;4-20mA output;Intellectual signal treatment technology, guarantee that the instrument meets various kinds of operating occasionAll metal outer cover (IP67), airproof and alkali-resisting, meet the abominable environment.