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Inwater technology tpg tracker

The InWater TPG Tracker is a handheld, portable device providing reliable and accurate measurements of total dissolved gas pressure, ΔP, barometric pressure and temperature. The Tracker is the perfect tool for spot checks or to data log at adjustable intervals. The ergonomic design allows for single handed operation of the tracker while deploying the probe with the other hand.

Technical Specifications


Measured / Derived

Measurement Range


Total Gas Pressure (mmHg TGP)


0–1550 mmHg

1 mmHg

Barometric Pressure (mmHg BP)


0–1550 mmHg

1 mmHg

Temperature (C)


0.0–40 °C

0.2 °C

Total Gas Pressure (TGP %)


0 – 200%


ΔP [ mmHg TGP – BP)


1550 – 1550 mmHg

1 mmHg

Probe dimensions

Length: 19 cm (7.4 in)
Diameter: 4.2 cm (1.6 in)

Handheld meter dimensions

Length: 16 cm (5.1 in)
Width: 8.4 cm (3.3 in)
Height: 2.8 cm (1.1 in)

Probe weight

0.45 kg (1.0 lbs)

Handheld meter weight

0.18 kg (0.4 lbs)

Temperature range

Storage / Operating: -5 °C to +60 °C

Response time

Typical: 5 minutes (90%)
***Response time is improved by insuring there is water flow past the probe. However, this is a passive measurement and therefore can require up to 1 hour for accurate measurements.


2000 mAh Li-ion Polymer battery

Battery runtime

Up to 8 hours

Connector – Probe

4-pin male M8, IP-67

Connector – USB

4-pin female M8, IP-67

Probe Cable

5 m (16 ft), 4 conductor, thermoplastic elastomer jacket
Custom lengths available upon request

Charger cable

0.9 m (3 ft) USB cable


Colour 6.1 cm (2.4”) LCD graphic display


Manual or continuous logging (11,000 records)


1-year warranty