A static grounding verification system for applications requiring dual-channel grounding monitoring, designed to check two grounding lines simultaneously, confirm true grounding and improve site safety control.
Earthing Pro DU is designed for industrial applications where two grounding lines need to be monitored at the same time.
Earthing Pro DU provides two independent active grounding channels in one controller.
Each channel has its own measurement, status indication and relay output, allowing two conductive objects or two transfer processes to operate separately or simultaneously.
Typical arrangements include drums, Ex IBCs, tanker trucks, railcars, transloading operations, LACT metering skids and mobile transloaders.
When two pieces of equipment, two grounding points or two grounding loops must both be confirmed, a standard single-channel grounding system may not provide sufficient monitoring.
Earthing Pro DU checks two grounding lines at the same time, helping confirm that both grounding conditions are safe before operation begins and improving site control.
Connect each clamp to its assigned conductive object or grounding point.
Each channel independently checks its complete grounding loop and requires ≤10 Ω.
The OLED identifies Clamp 1 and Clamp 2, displays their resistance values and alternates the active channel indication when both are in use.
A valid channel energizes its dedicated relay output; an invalid channel alarms and responds independently.
A customer-defined third relay can provide common permissive, common alarm or other combined logic.
After operation, return both clamps to their monitored positions.
Loading operations requiring dual-point grounding monitoring
Industrial sites where two devices must be grounded simultaneously
Hazardous liquid transfer
Chemical and petrochemical loading stations
Storage and transfer applications with higher safety requirements
Two metal drums or two Ex IBCs
Two tanker trucks or two railcars
Railcar-to-tanker and tanker-to-railcar transloading
LACT metering skids
Mobile transloader installations
Any suitable pair of conductive items or processes
Monitors two grounding lines at the same time
Improves safety control in more complex operations
Reduces risks caused by insufficient single-point monitoring
Supports interlock control
Improves operational reliability
| Power Supply | 24–48 VDC or 85–250 VAC |
| Ground Loop Resistance Threshold | ≤10 Ω |
| Alarm Indication | Audible and visual alarm with OLED display |
| Interlock Output | NO/NC dry contact |
| Certification | II 2(1) G Ex db ia [ia Ga] IIC T6 Gb; II 2(1) D Ex ia tb [ia Da] IIIC T80°C Db |
| Clamp / Cable Configuration: Optional cable lengths available, including 5 m, 7 m, 10 m, 13 m and 15 m | |
| Cable Gland Options: Ex armored and Ex non-armored cable glands available | |
| Monitoring Channels | 2 independent channels |
| Standard Relay Outputs | 2, one per channel; optional third relay with customer-defined function |
| Relay Contact Rating | 5 A at 30 VDC / 10 A at 250 VAC |
| Operating Temperature | -40°C to +60°C; |
| Ingress Protection | IP66 |
Note: Equipment configuration may vary slightly depending on the model and application requirements.
It is used for loading and transfer operations where two grounding lines need to be monitored at the same time.
Earthing Pro DU can verify two grounding loops simultaneously, making it more suitable for sites requiring dual-point grounding confirmation or dual-equipment grounding monitoring.
Yes. Earthing Pro DU can provide interlock output for integration with pumps, valves or control systems.
The display identifies CLAMP 1 and CLAMP 2. When one clamp is active, the other can remain IDLE. A connected channel shows CONNECTED and its resistance value in the corresponding lower corner. When both are active, the top arrow alternates to identify the channel currently presented in the centre.
Yes. Each standard channel measures and drives its own relay independently unless the customer-defined third relay or external control logic requires both channels.
It can be configured for a common permissive, common alarm or another project-specific auxiliary function.
DU can monitor any suitable pair of conductive items, including drums, Ex IBCs, tanker trucks, railcars and equipment used on metering or transloading skids.
Copyright © 2026 by Qingdao Alptec Automation Co.,Ltd. All Rights Reserved
PRIVACY POLICY
