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Tinytag Data Loggers

Tinytalk Current Logger

Tinytag Talk 2 Current Logger

The Tinytag Talk 2 TK-4802 is a compact, cost-effective, single-channel DC current loop data logger housed in Gemini’s iconic, lightweight 35mm film canister style enclosure. Specifically engineered to record standard analog process telemetry, the TK-4802 monitors a dedicated 0 to 20mA DC range (natively supporting 4-20mA industrial loops). It serves as the instrumentation-focused companion to the TK-4702 and TK-4703 voltage units, providing an accessible solution for logging third-party process sensor signals where physical installation space inside machinery or control panels is highly restricted.

Core Features & Technical Breakdown

  • Film Canister Form Factor: Weighs a featherlight 30g and measures an ultra-compact 34 X 54 mm. This profile lets operators insert the logger behind electrical din-rails, inside junction boxes, or within tight lab-bench enclosures.
  • Low-Impedance Input Loop: Engineered with an internal 75 Ohms input impedance, allowing the logger to break into 4-20mA loops safely with a negligible loop voltage drop, preserving primary signal accuracy.
  • 16-Bit High-Resolution Sub-Sampling: Delivers a fine measurement resolution of 1mµA or better, ensuring highly detailed tracking of tiny sensor fluctuations.
  • Non-Volatile Memory Integrity: Stores up to 16,000 continuous readings. All historical tracking data remains completely secure and downloadable even if field batteries exhaust mid-run.
  • Smart Pulse Sensing Wire: Ships standard as a plug-and-play kit with the CAB-3233 3-wire input lead (1.5m length). The lead features a hardware Sense Line wire that outputs a brief +3.5V signal for roughly 85ms exclusively when a reading is sampled. This allows you to pulse external low-draw sensors awake only when needed, avoiding unnecessary field drainage.

Core Technical Specifications

  • Current Range: 0 to 20mA DC (Optimised for standard 4-20mA instrumentation loops).
  • Maximum Loop Overload: 50mA.
  • Maximum Circuit Voltage: 30V DC.
  • Logging Interval: User-programmable from 1 second up to 10 days.
  • Case Protection Rating: IP30 (Splashproof only; indoor or panel-protected use).
  • Operating Temperatures: -40°C to +85°C.
  • Power Supply: ½AA 3.6V internal lithium cell (typically yields a 1-year operational cycle).

Applications

Providing a secondary, un-tamperable data record of climate or gas levels in sensitive biological and chemical research spaces.
Serving as an accessible, cost-effective tool for students to learn how 4-20mA process signals are scaled, calibrated, and graphed in real-world scenarios.
Intercepting 4-20mA pressure loops on pneumatic lines or hydraulic systems to discover hidden pressure drops during peak shift hours.
Tracking liquid or gas flow rates over several weeks to spot piping leaks, clogged filters, or pump inefficiencies.
Connecting to heavy-duty AC current clamps to log machinery run-times and electrical load cycles for preventative maintenance.

Frequently Asked Questions

â–¶ Q: Can this logger read standard 4-20mA industrial sensors?
A: Yes. Its native measurement window is 0 to 20 mA DC, meaning it maps seamlessly to industry-standard 4–20 mA transmitter loops.
â–¶ Q: Does the package include the connection cable?
A: Yes, the -PK variant comes complete with the CAB-3233 1.5 meter 3-wire input lead, which uses a 2.5mm jack to plug directly into the unit.
â–¶ Q: Can I use this logger outdoors or in damp basements?
A: No, it is rated IP30 (indoor/office environments only). For high-humidity or wet areas, you must place the logger inside a separate weatherproof enclosure.
â–¶ Q: Does it power the connected loop or sensor?
A: No. The TK-4802 is purely a passive recording device. Your external circuit or sensor loop must have its own independent power supply.
â–¶ Q: What happens to my data if the battery dies while recording?
A: Your logged data remains completely safe. The device utilises non-volatile internal flash memory, retaining up to 16,000 readings even during absolute power failure.
â–¶ Q: How often does the battery need to be replaced?
A: Under typical logging conditions, the user-replaceable 1/2 AA 3.6V Lithium battery will last up to 2 years.
â–¶ Q: Can I program it to stop recording automatically when it is full?
A: Yes. Via the software, you can configure it to stop when full, stop after a precise number of readings, or wrap around (overwrite the oldest data).
â–¶ Q: Can the logger store maximum and minimum peaks?
A: Yes. You can set the interval logging type to capture actual snapshot values, the absolute minimum value, or the maximum peak within that specific logging window.
▶ Q: Can I calibrate or change the scale to read direct engineering units (e.g., bar or °C)?
A: Yes. While it logs the raw mA value, the Tinytag Explorer software allows you to build custom calibrations to display the final graph in the exact units of your primary sensor.
TK-4802-PK

TK-4802-PK

Tinytalk 2 TK-4802-PK current logger, current range 0-20mA. Memory 16,000 readings. Logging rate 1 sec to 10 days with min, max & actual readings. Comes complete with input cable.

£80.00
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SWPK-5-USB

SWPK-5-USB

Tinytag Explorer Software and download cable starter pack. The SWPK-5-USB starter pack contains USB cable, 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, Talk 2 and CO2 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.

£65.00
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