— Flow and network equipment


Network sensing
full-chain equipment

HKI network monitoring family — radar flow, ultrasonic flow, level, manhole sensing, and acquisition terminals. From pit sensing to cloud transport, one protocol and one access standard, 24-hour online duty, and alarms on exceedance.

0 Core equipment lines
0 Measurable items
0 Protocol
0 Pit protection rating
View radar flow meter Get a network plan →
Network node · live panel ONLINE
Instantaneous flow
186.5
m³/h
Level
0.86
m
Velocity
1.24
m/s
Fill ratio
62
%
Cover tilt
2.4
° normally closed
Signal strength
-68
dBm
HJ 212 / MQTT / Modbus · no platform rewrite Auto alarm on anomaly
Five network equipment lines · PIPE NETWORK FAMILY
Radar-ultrasonic flow meter ZYGW-LD04
Ultrasonic Doppler flow meter ZYS-F12
Millimeter-wave radar level meter ZYSW-LD02
Smart manhole sensor ZYGW-QJ
Drainage network monitor ZYGW-CTU
Radar-ultrasonic integrated flow meter
— Radar-ultrasonic integrated flow meter

Radar-ultrasonic
integrated flow meter

ZYGW-LD04 radar-ultrasonic integrated flow meter fuses FMCW millimeter-wave level with Doppler ultrasonic velocity. Crown mount, no confined-space entry, no shutdown. Full and partial pipe switch automatically. One station covers flow, level, velocity, and fill ratio for storm/sewage networks, open channels, and outfalls.

  • Dual-wave fusionRadar level + ultrasonic velocity, fused in software
  • Top mount, no entryCrown tap install, O&M without confined-space entry
  • All-condition fitFull / partial pipe / open channel / box culvert auto-switch
  • 3° narrow beam3° radar beam, misses walls, measures water cleanly
  • IP68 protectionSealed body, stable in long pit immersion
  • Multi-protocol outputRS485 / 4G / NB-IoT,Modbus / 212 / MQTT
0.02~10Velocity range m/s
0.3~15Level range m
±1%Flow accuracy
Applications Storm/sewage mains River outfall Open channel / river Box culvert / covered drain Pump-station inlet/outlet
View details
— Ultrasonic Doppler flow meter

Ultrasonic Doppler
Flow meter

ZYS-F12 ultrasonic Doppler flow meter uses Doppler shift for velocity, level, and temperature on one probe. Zero dead band, still accurate at low velocity, bidirectional flow for reverse-flow networks. Intrinsically safe for chemical parks and wastewater plants.

  • One probe, three measurementsVelocity, level, and temperature together
  • Zero dead bandStarts at 0.01 m/s, accurate at low flow
  • Bidirectional flowForward and reverse velocity for reverse-flow networks
  • Intrinsic safetyEx ia IIC T4 Ga, usable in chemical parks
  • Temperature compensationBuilt-in temperature compensation for sound-speed drift
  • Multiple commsRS-485 / 4G / NB-IoT, standard Modbus
0.01~10Velocity range m/s
±0.5%Velocity accuracy
Ex iaIntrinsic safety
Applications Sewage network Chemical-park outfall Storm/sewage separation Wastewater treatment plant Reverse-flow reaches Small open channel
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Ultrasonic Doppler flow meter
Millimeter-wave radar level meter
— Radar level meter

Millimeter-wave
Radar level meter

ZYSW-LD02 radar level meter uses 80 GHz FMCW millimeter-wave for non-contact continuous level. A 3° beam misses pipe walls and obstacles, unaffected by vapor, fog, dust, or temperature. IP68 sealed body for manholes, rivers, storage tanks, and pump stations.

  • 80 GHz millimeter-waveFMCW modulation, stable and immune
  • 3° narrow beamAvoids walls, brackets, and obstacles
  • ±2 mm accuracyHigh accuracy for assessment-grade monitoring
  • Non-contactNo water contact, low maintenance, long life
  • IP68 fully sealedReliable in long underwater and harsh pit duty
  • Wide range0.05–30 m range for shallow and deep water
Applications Manhole level River level Storage tank Pump wet well Flood monitoring point Storm inlet
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— Smart manhole displacement sensor

Smart manhole
multi-state sensor

ZYGW-QJ smart manhole sensor with a 3-axis gyroscope and accelerometer. Detects shift, tilt, immersion, and loss, and reports events in milliseconds. Low-power NB-IoT tri-network, standby life ≥ 5 years, IP68 explosion-proof and waterproof for harsh pits.

  • 3-axis attitudeGyroscope + accelerometer for attitude changes
  • Multi-state alarmsShift / tilt / immersion / loss / vibration events
  • NB-IoT tri-networkAuto-switch among carriers for deep pit coverage
  • Ultra-low power10 µA standby, battery life ≥ 5 years
  • IP68 explosion-proofFully potted, for pit immersion and flammable gas
  • Millisecond reportingEvents report as they happen
≥5years standby life
IP68Fully sealed protection
3-axisPrecise attitude sensing
Applications Municipal manhole covers Power/comms pits Gas-valve pits Gully grating Utility tunnel Theft-prone roads
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Smart manhole displacement sensor
Drainage monitoring system
— Drainage monitoring system

Drainage network
monitoring system

ZYGW-CTU drainage monitoring system: one-piece RTU with analog inputs, digital inputs, serial ports, and wireless. 4G / NB-IoT / Cat.1 backhaul, 10 µA standby for battery pits. Built-in HJ 212 / MQTT / Modbus — connect to water platforms with no extra development.

  • Integrated designAcquisition + transport + power management in one
  • Multi-channel inputs8 AI / 6 DI / 4 RS-485, plug-and-play sensors
  • Multi-network backhaul4G / NB-IoT / Cat.1, selected and switched as needed
  • Ultra-low power10 µA standby, battery duty for years
  • Built-in protocolsHJ 212 / MQTT / Modbus, connect without rewrite
  • Remote setupRemote parameter and firmware updates, little field work
Applications Network monitoring node Pump-station remote control Outfall data upload Storm/sewage separation Flood-warning site Distributed points
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— Application matrix

Match equipment sets to each network scene

From mains to manholes, outfalls to pump stations — lock the form to the target, site, and power, then combine into one sensing network.

Storm/sewage mains Flow + level + velocity + fill ratio in oneRadar-ultrasonic integrated flow meter
River-outfall monitoring Flow + level + overflow events + data uploadUltrasonic flow meter + radar level meter + RTU
Manhole level monitoring Continuous level + overflow warning + low powerRadar level meter + terminal
Cover safety supervision Shift / tilt / immersion / loss multi-state alarmsSmart manhole displacement sensor
Urban flood warning Ponding depth + graded thresholds + linked reportsRadar level meter + network terminal
Storm/sewage separation Split-flow metering + illicit connection detection + zone compareUltrasonic flow meter + terminal
Pump station / storage Level + flow + pump status + control outputsRadar level meter + network terminal
Open-channel flow Section velocity + level + flow in one calculationRadar-ultrasonic integrated flow meter

Tell us about your network,
and we will match sensing equipment

Diameter, bury depth, and power change the instrument and install. Tell us the parameters, network type, site, and power. An engineer returns a network plan and equipment list within one working day.

Get a network plan Download the family PDF
Network Storm/sewage / open channel / outfall / pump station / manhole
Parameters Flow / level / velocity / cover status / fill ratio
Environment In-pit / above-ground / mains or not / diameter and bury depth
Response A dedicated selection list within one working day