It all depends on what you are trying to do.
If you are measuring the temperature in a fridge or freezer, the convenience of just popping a logger inside might be tempting.
If you need to measure a liquid, then the probe is the go.
Older fridges from the Quirks Medisafe range had LogTag probes built into their cabinets, and were sold with the LogTag TREX-8 External Probe logger.
If you are replacing the logger, there are two good options: another TREX-8, or the premium TRED30-16R.
The TRED30-16R has the advantage of a replaceable battery, an LCD display, and an audible alarm.
Both logger options use the same software and the same LogTag Reader.
Latency, when it comes to temperature logging, refers to the delay between a change in temperature and when that change is detected and recorded by the logger. This delay can be due to the sensor’s design, the materials it’s placed in, or the logging interval. While it might sound like a disadvantage, latency can actually serve a useful purpose in certain environments—particularly where short-term temperature spikes are common but not harmful.
For example, in a busy commercial fridge, the temperature may briefly rise every time the door is opened. A logger with high latency won’t immediately react to these short fluctuations, helping to avoid unnecessary alarms or false data indicating a problem when there isn’t one. In these cases, a slight delay in response acts like a filter, focusing attention on real issues—such as prolonged exposure to unsafe temperatures—while ignoring the everyday ups and downs that don’t affect product quality or safety.
Depending on the type of logger you have, connecting your logger to your PC means either:
First Generation LogTags use a separate Reader (sometimes called a dock) for configuration and for downloading recorded data.
The Second Generation loggers only require a USB port or cable. Apart from saving the cost of the Reader, this makes them much better suited for shipping, because the recipient doesn’t need a LogTag Reader to download a report about the shipment’s journey.
