Placing a logger’s probe in a vial of liquid allows you to mimic the temperatures being experienced by liquids (e.g. vaccines) rather than just measuring air temperature. Liquids heat and cool slower than the surrounding air and are less susceptible to quick fluctuations, such as opening the fridge door. This means your temperature log graph will have less severe peaks and troughs.
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Pour the glycol into the vial.
Thread the screw-on cap onto the probe first.
Lubricate the tip of the probe by dipping it in the glycol.
Push the probe through the rubber plug.
The plug forms a leak-proof seal on the vial. It is locked into place by the screw-on cap.
Propylene Glycol is a non-toxic, slightly viscous and colourless liquid. It is ideal for measuring temperatures because it has a freezing point of -59°C.
This means that if the fridge gets below zero, it won’t freeze, unlike some other liquids.
Latency is the time it takes for something to change temperature, and different substances have vastly different latencies. If you apply a heat source to air, the air quickly becomes hot. If you apply a heat source to a liquid, it will heat up, but much more slowly.
So, if your logger is measuring air temperature, you will see rapid fluctuations in temperatures. Whereas, if your logger is measuring a liquid, those fluctuations will be much less pronounced.
In the graph below, we can see the Dual Sensor logger in action. The blue line represents air temperature, measured by the loggers internal sensor, while the pink line represents the temperature of the glycol in the vial, measured by the external probe.
You can see that the variation between minimum and maximum temperatures is much lower for the liquid temperature than for the air temperature.
Note that only the metal tip of the probe is submersible. If liquid enters the join between the cable and the probe tip, the probe can be damaged.
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| QUICK SPECS | |
|---|---|
| Model | CLD-01 |
| Type | Temperature only with Dual Sensors |
| Temperature Range | Internal sensor: -23°C to +60°C External sensor: -40°C to +80°C |
| Humidity Range | N/A |
| Battery Type | CR2450 |
| Battery Life | Replace every 12 months |
| Accuracy |
Internal Sensor: ±0.3℃ (0℃ to +60℃) ±0.3℃ to ±0.7℃ (other temperatures) External Probe: ±0.5℃ (-20℃ to +40℃) ±1℃ (other temperatures) |
| Offline Memory | approx 24 days logging at 5 minute intervals |
| QUICK SPECS | |
|---|---|
| Model | CLX-01 |
| Type | Temperature only with Probe |
| Temperature Range | -40°C to 60°C Can operate up to 80°C for short periods |
| Humidity Range | N/A |
| Battery Type | CR2450 |
| Battery Life | Replace every 12 months |
| Accuracy | ±0.5℃ (-20℃ to +40℃) ±1℃ (other temperatures) |
| Offline Memory | approx 24 days logging at 5 minute intervals |
The National Association of Testing Authorities (NATA) is the recognised national accreditation authority for analytical laboratories and testing service providers in Australia. It is an independent, not-for-profit organisation that provides independent assurance of technical competence.
NATA accredits organisations to perform testing and inspection activities for their products and services. This gives consumers the assurance they need to make safe, healthy and reliable choices .
To prove it, we’ll send you a Starter Kit to try out for a whole month.
Set it up, have a play, explore the features – obligation free.
If you love it, just let us know.
If not, just send it back.
