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Tinytag Data Loggers

Tinytag-Aquatic-2-Temperature-Logger-TG-4100

Tinytag Aquatic 2

The Tinytag Aquatic 2 TG-4100 is an ultra-rugged, completely submersible temperature data logger engineered for long-term environmental tracking in marine, freshwater, and industrial wet environments. Protected by a high-visibility, impact-resistant yellow case rated to IP68 submersible standards, the TG-4100 is designed to withstand prolonged submersion down to significant depths. Its unique cylindrical profile features a integrated structural mounting hole, making it the industry standard for mapping river temperatures, tracking ocean currents, monitoring aquaculture pens, and profiling deep industrial water reserves.

Core Features & Technical Breakdown

  • Fully Submersible IP68 Enclosure: The heavy-duty plastic casing is completely sealed against moisture ingress, handling continuous, deep underwater deployments down to 50 meters (165 feet) or a maximum pressure threshold of 5 bar.
  • Inductive High-Speed Data Offloading: To preserve its absolute waterproof integrity, the TG-4100 features a completely solid outer shell with zero physical data plugs or sockets. Data configuration and extraction are handled entirely via the ACS-3030 Inductive Pad. Technicians simply place the sealed logger face-down on the pad to offload records, removing the risk of water ingress or O-ring wear during data extraction.
  • Massive Non-Volatile Memory Array: Stores up to 32,000 continuous readings via an ultra-stable internal 10K NTC thermistor sensor, capturing highly accurate aquatic temperature arrays with a resolution of 0.02°C or better.
  • High-Visibility Safety Yellow Housing: The vibrant color scheme facilitates easy recovery by field divers or researchers working in low-visibility silt, dense riverbeds, or deep marine canopies.
  • Programmable 2-Alarm Triggers: Features user-defined high and low alarm limits. Internal event flags register immediately within the data log if a water column suffers an unexpected ecological thermal shock or machinery cooling failure.

Core Accuracy & Environmental Compliance

Accuracy Threshold: The TG-4100 delivers a high precision reading accuracy of ±0.5°C across its primary tracking band from 0°C to 50°C.

This robust accuracy is critical for marine biologists and environmental compliance officers tracking micro-climatic shifts, coral bleaching events, and industrial thermal effluent discharges into local river catchments.

Applications

Attached to weights or riverbeds to monitor seasonal water temperature fluctuations, protecting local fish populations and mapping ecological health.
Suspended directly inside open-ocean fish pens or inland reservoirs to track water quality and optimize feeding cycles for salmon, trout, or shellfish.
Deployed at the exit discharge paths of manufacturing arrays or power plants to verify that cooling water effluent falls within legal environmental regulatory limits.
Tied to deep-sea mooring lines, buoys, or crab traps to profile marine currents and oceanic thermal layering over multi-year study windows.

Frequently Asked Questions

▶ Q: Can I plug a standard USB cable directly into the Aquatic 2 to download data?
A: No. To guarantee a perfect IP68 waterproof rating down to 50 meters, the TG-4100 has no physical ports. It requires the ACS-3030 Inductive Offload Pad, which plugs into your PC's USB port and reads the data wirelessly through the logger's plastic shell.
▶ Q: Can the internal battery be replaced by the user in the field?
A: No. Because the case is factory-sealed to maintain its structural pressure integrity under deep water, the battery is not user-serviceable. When the battery depletes after approximately 3 years of use, the unit must be replaced or returned to an authorized service centre for factory refurbishment and pressure recertification.
▶ Q: How do I mount the logger securely underwater so it doesn't wash away?
A: The casing is designed with a robust, integrated mounting lug featuring an open hole through the top. This allows you to easily anchor the logger using heavy-duty zip-ties, wire ropes, chains, or direct shackles to underwater weights, buoys, or structural scaffolding.
▶ Q: Is the data safe if the logger is left underwater for months past its memory capacity?
A: Yes. The TG-4100 can be configured to "Stop when full" to preserve the initial deployment record, or to overwrite the oldest data in a continuous loop. Because it utilizes non-volatile flash memory, your data is completely secure even if the battery runs out before recovery.
TG-4100

TG-4100

Tinytag Aquatic 2 Temperature Logger (TG-4100) in a Waterproof high visibilty yellow case. Temperature range -40 to +70°C. Memory 32,000 readings with delayed and magnetic switch trigger start options, plus 2 programmable alarms. Logging intervals 1 sec to 10 days with min, max & actual readings. Data can be downloaded via the ACS-3030 inductive pad. Tinytag Aquatic 2 temperature logger is fully submersible to a depth of 500m and an attachment point can be used to secure the logger in position.

£130.00
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SWPK-3-USB

SWPK-3-USB

Tinytag Explorer Software and download cable starter pack. The SWPK-3-USB starter pack contains USB inductive pad, Software licence key and an English, French, German, Italian, Spanish and Swedish quick start guide. This pack is suitable for use with the Tinytag Transit, Splash and Aquatic data loggers. The Tinytag software comes with a site licence allowing installation on multiple PCs at the same location, additional software should be purchased when used at a different site location.

£75.00
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ACS-6000

ACS-6000

Trigger Start Magnet for various Tinytag data loggers. The magnet is ideal for delayed triggering of Tinytag loggers that have been set up for a trigger start. The magnet is merely passed over the correct location on the logger and the lights will start to flash showing that logging procedure has been started. The position of the unit's trigger start switch is indicated by the • • • label on the back of the logger.

£10.00
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