Description
RIU3 with BP Sensor and InWater TGP Probe (7m Cable)
This bundle pairs an InWater RIU3 remote interface unit with an integrated barometric pressure (BP) sensor and a 7 m InWater TGP probe, giving you a fixed-installation Total Gas Pressure monitoring point with digital RS-485/Modbus output. Where the standard TGP Transmitter outputs two analog signals (0-20 mA, 4-20 mA, or 0-5 VDC), the RIU3 is the InWater option for sites that need Modbus protocol integration into a SCADA system, PLC, or other digital monitoring network.
The onboard BP sensor lets the unit calculate Delta P (TGP – Barometric Pressure) directly at the installation site rather than relying on an assumed or remote barometric reading, which improves accuracy for gas supersaturation alarms and long-term trend logging.
What’s Included
- RIU3 remote interface unit with built-in barometric pressure sensor
- InWater TGP probe, 7 m cable, membrane-diffusion sensing element
- RS-485, Modbus protocol output
TGP Probe Specifications
| Parameter | Value |
|---|---|
| Total Gas Pressure | 0-1550 mmHg, 1 mmHg resolution, +/-2 mmHg accuracy |
| Barometric Pressure | 0-1550 mmHg, 1 mmHg resolution |
| Total Gas Pressure (%Sat, derived) | 0-200%, 1% resolution |
| Delta P (derived) | -1550 to 1550 mmHg, 1 mmHg resolution |
| Response time (TGP) | ~90% at 5 minutes with flow |
| Max. operating depth | 60 m (200 ft) |
| Operating temperature | 0-40°C |
| Max. deployment time | 1 month (cartridge service required) |
| Cable length | 7 m (custom lengths available) |
| Output | RS-485, Modbus protocol |
Note: detailed RIU3 unit specifications (dimensions, power requirements, housing rating) were not available in the manufacturer literature on hand. Please confirm these details with InWater Technologies before publishing if they’re needed for the listing.
Manufactured in Canada by InWater Technologies and backed by a 1-year warranty on the probe.
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