EDS · Battery powered 4G logger
Hawk
The 4G logger built for Australian sewer networks. It lives inside the maintenance hole, with no cabinet to build and no power to bring to site.
The Hawk installs inside the maintenance hole. It powers and reads your flow, level and quality sensors over RS485, logs as often as every second, stores every reading on board, and reports over 4G LTE to FlowSense and to your own systems.
There is no cabinet to build, no power to bring to site, and no need to enter the chamber to commission or reconfigure it. Nothing is mounted at the surface, so there is nothing to damage, vandalise or maintain in the road reserve.
Hawk connects directly to E-Flow 3 and any other Modbus RTU sensor, and reports to FlowSense: one team for the sensor, logger, telemetry and data.
Specifications
Hawk in detail.
Telemetry
| Cellular | 4G LTE |
|---|---|
| Logging interval | 1 second to 24 hours |
| Reporting interval | 1 minute to 24 hours |
| Data centres | Up to 4, each with primary and standby addressing |
| Configuration | EMS-Flow: Bluetooth on site, remote over 4G |
| Firmware | Remote update over 4G |
| Operating modes | Low power and debug, switchable |
Sensor interface
| Ports | 3 × RS485, independent channels |
|---|---|
| Sensors | Modbus RTU sensors, including E-Flow 3 |
| Serial settings | Baud rate, parity and stop bits set per channel |
| Protection | 15 kV ESD on every RS485 port |
| Sensor power | 2 × switched 12 V outputs, 500 mA (6 W) each |
| Warm up | Power on delay up to 255 s before each reading |
| Scheduling | Logging interval, warm up and retries set per channel |
Data and power
| On board memory | 32 MB, 10 years of data retention |
|---|---|
| Battery | Internal: 72, 80 or 100 Ah rechargeable, or 152 Ah primary |
| Operating current | Under 65 mA average at 7.2 VDC |
| Sleep current | 40 µA or less at 7.2 VDC |
| External supply | None required |
Enclosure and environment
| Protection | IP68, submersible |
|---|---|
| Material | V0 flame retardant, corrosion resistant ABS |
| Lid | Bolted, O ring sealed; SIM and battery inside |
| Controls | Magnetic wake point and status indicators; no switches |
| Dimensions | Ø165 × 243 mm, excluding handle and antenna |
| Mounting | Stainless wall bracket, expansion bolts |
| Operating temperature | −40 to 60 °C, 95 % humidity non condensing |
| Storage temperature | −40 to 85 °C |
Sensor connector wiring
| Red | 12 V switched sensor supply |
|---|---|
| Black | 0 V power ground |
| Green or blue | RS485 A |
| Yellow | RS485 B |
Ordering
| Hawk 72 | 72 Ah rechargeable. Short surveys and sites visited regularly. |
|---|---|
| Hawk 80 | 80 Ah rechargeable. General network monitoring with scheduled visits. |
| Hawk 100 | 100 Ah rechargeable. Long intervals and several sensors on one logger. |
| Hawk 152 | 152 Ah primary. The longest unattended service, for permanent and remote sites. |
| Chamber sensing | Option for any model: methane, temperature and humidity, and tilt to flag a disturbed unit. |
Typical values. Battery life depends on the logging and reporting intervals, the connected sensors and the site temperature, so EDS sizes the battery for each deployment. Full details are in the Hawk datasheet.
Put a Hawk in the maintenance hole.
Tell us the network, the sites and the data you need. EDS will size the battery, supply the bracket and sensors, install and commission from the surface, and deliver the data through FlowSense. Also available in EDS rental fleets for temporary flow surveys.