Description
InWater TGP Probe, 7m Cable (mV Output)
The InWater TGP probe is a membrane-diffusion sensor built to measure Total Gas Pressure (TGP) directly in water — the same probe used in the InWater Tracker handheld meter and in TGP Transmitter and RIU3 installations. This version outputs a raw millivolt (mV) signal and ships with a 7 m cable, making it a direct-fit replacement or spare for existing InWater systems, or the starting point for a custom monitoring setup.
Total Gas Pressure monitoring matters wherever dissolved gas can exceed saturation: below dam spillways, near aeration or pressurized pumping equipment, in turbid water with entrained air, or during algal blooms and rapid temperature swings. Left unchecked, gas supersaturation can cause bubble trauma and sub-lethal stress in fish and other aquatic species. The TGP probe gives you the raw signal needed to measure it accurately.
Key Specifications
| Parameter | Value |
|---|---|
| Measurement principle | Membrane diffusion |
| Output | Raw millivolt (mV) signal |
| TGP measurement range | 0-1550 mmHg |
| Resolution / accuracy | 1 mmHg / +/-2 mmHg |
| Response time (TGP) | ~90% at 5 minutes with water flow; up to 1 hour passive |
| Max. operating depth | 60 m (200 ft) |
| Operating temperature | 0-40°C |
| Max. deployment time | 1 month (TGP cartridge service required) |
| Material | Delrin, Silicon |
| Probe dimensions | 25 cm length, 4.3 cm diameter |
| Probe weight | 0.23 kg (0.5 lbs) |
| Cable length | 7 m (custom lengths also available) |
| Connector | 4-pin male M8, IP-67 |
| Warranty | 1 year |
Pairs With
This mV-output probe is designed to connect to the InWater Tracker handheld meter, the InWater TGP Transmitter (for 0-20 mA, 4-20 mA, or 0-5 VDC analog output), or an RIU3 unit for RS-485/Modbus output. The probe cartridge is a separate, replaceable wear item (InWater part 10018) that should be serviced periodically to maintain accuracy.
Manufactured in Canada by InWater Technologies and backed by a 1-year warranty.
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