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HQ-51L (HQ-8260W) water droplet type radar level gauge operates in the frequency range of 24G~26GHz. It is a non-contact radar based on frequency modulation continuous wave principle, with super strong signal processing capability, stronger measurement effectiveness and repeatability than traditional radar. It can measure the distance, liquid level and volume of liquids, slurries or solids, and has some characteristics that pulse radar or general radar do not have on the market. HQ-51L radar level gauges are suitable for liquid/material level measurement of corrosive media, dust, mist, and easily crystallizable media inside containers.
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(1) Chinese display interface
(2) Two line communication protocol; Despite the energy consumption of the large screen, it still supports sufficient power to ensure a measurement range of 80 meters.
(3) Shell:
a. The external structure is made of aluminum alloy material and designed according to explosion-proof requirements
b. Equipped with a dual cavity structure where the power supply and electronic module are independent of each other, ensuring safe wiring; Can meet the requirements of intrinsic safety and explosion-proof special occasions
(4) Antenna:
a. Multiple antenna specifications, horn antenna, droplet shaped (spherical) antenna
b. The emission angle is smaller than that of ordinary products, with a horn antenna at 4 ° and a spherical antenna at 2 °
(5) Ultra low dielectric constant measurement: direct measurement can reach 1.5; The bottom tracking mode can measure 1.1 media, and almost all media levels can be measured.
(6) Unique empty spectrum settings;
After using this technology, all kinds of interfering objects in the container, including foam, dust, steam between the products, and trembling surfaces, can be effectively operated; Make it more widely and reliably adaptable.
Environmental temperature: -20~50 ℃
Relative humidity: 5%~100% (including direct humidity)
Work pressure: 86KPa~108KPa
Process connection: thread or flange
Repeatability: ± 3mm
Resolution: 1mm
Supply voltage: 24VDC/220V AC/Ripple voltage: 1Vpp
Power consumption: 22.5mA (max)
Explosion proof grade: Explosion proof Ex db IIC T6 Gb Intrinsically safe Ex db ia IIC T6 Ga
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| Frequency | 26GHz |
| Measure Distance | 50m |
| Resolution | 1mm |
| Precision | ±10mm |
| Backlash | ±5mm |
| Blind Area | 0.8m |
| Measurement Interval | ≥1s, according to the set parameters |
| Response Speed | ≥5s, according to the set parameters |
| Beam Angle | 8° |
| Dimensions (excluding flanges) | 97*97*410mm |
| Install | Flange DN80, DN100, DN150 |
| Process Temperature | -40℃-85℃ |
| Process Pressure | Atmospheric pressure |
| Relative Humidity | <95%RH |
| Antenna Material | PTFE |
| Power Supply | 16~36VDC (24VDC typical value) |
| Signal Output | 4~20mA, two-wire system / four-wire system |
| Fault Output | No change/22mA/20.5mA/4mA (optional) |
| On-site Operation/Programming | 128*64 dot matrix LCD |
| *Heavy Load | 500Ω |
| Communication | HART |
| Shell Material | Aluminum alloy |
| Protection Level | IP67 |
| Cable Entrance | M20x1.5 |
| Recommended Cables | AWG18 or 0.75mm² cable |
4. Selection
HQ-51L Radar Level Gauge Selection Table
| HQ-51L (HQ8260) | Intelligent Radar Level Gauge | ||||||
| Radar Type | AS- | 8260AS Flat radar level gauge | |||||
| P- | 8260P Parabolic radar level gauge | ||||||
| W- | 8260W Water droplet radar level gauge | ||||||
| L- | 8260L High frequency pulse radar level gauge | ||||||
| S- | 8260S Hydrological and Hydraulic Radar Water Level Gauge | ||||||
| H- | 8260H Anti corrosion rod type radar level gauge | ||||||
| AH- | 8260AH Purging type planar radar level gauge | ||||||
| L-U- | 8260L Pulse radar level gauge - universal joint | ||||||
| AG2- | 8260AG2 Enhanced lens radar level gauge | ||||||
| AS-H- | 8260AS-H High temperature planar radar level gauge | ||||||
| AZ- | 8260AZ Plane self aiming alignment radar level gauge | ||||||
| L- | 8260L-80G High frequency pulse radar level gauge | ||||||
| AH-H- | 8260AH High temperature blowing type planar radar level gauge | ||||||
| AX- | 8260AX Fully enclosed sanitary tank radar level gauge | ||||||
| AZ-F- | 8260AZ-F Sanitary self aiming planar radar level gauge | ||||||
| Antenna Material | A1 | Stainless steel horn 304 | |||||
| A2 | Stainless steel horn 316L | ||||||
| A3 | Stainless steel horn 304 liningPTFE | ||||||
| A4 | PTFE lining bushing F46 | ||||||
| A5 | PTFE rod type | ||||||
| A6 | 80G circular arc | ||||||
| Electrical Interface | N | 1/2NPT | |||||
| M | M20*1.5 | ||||||
| Pressure Rating (flange) | 1 | 1.0MPa | |||||
| 2 | 1.6MPa | ||||||
| 3 | 2.5MPa | ||||||
| 4 | 4.0 MPA | ||||||
| 5 | Special Customization | ||||||
| Measuring Medium | 1 | Liquid | |||||
| 2 | Solid | ||||||
| 3 | Particle | ||||||
| 4 | Dust | ||||||
| Output Signal | A | 4-20mA | |||||
| R | RS485 communication | ||||||
| F | Foundation Fieldbus | ||||||
| P | Profibus PA | ||||||
| G | 4G IoT | ||||||
| H | Two wire 4-20mA with HART communication protocol | ||||||
| I | Four wire 4-20mA HART;9.6-48VDC,20-42VDC | ||||||