Which probe for which temperature
| Probe | Range according to HW group | Accuracy according to HW group | Use |
|---|---|---|---|
| Temp-1Wire IP67, 3 m | -10 to +80 °C | ±0.8 °C | Chilled storage. Not for freezers |
| Temp-1Wire Flat, 3 m | -30 to +60 °C | ±0.8 °C from -10 to +60 °C, ±2 °C across the full range | Flat cable that passes under the door seal |
| Temp-1Wire Outdoor, 3 m | -50 to +125 °C | ±0.8 °C from -10 to +80 °C, ±2 °C across the full range | Frozen storage |
| Efento external probe, 1 m | -55 to +125 °C | ±0.5 °C from -10 to +85 °C, ±2 °C elsewhere, according to Efento | Included in Efento packs |
What accuracy can you expect at -18 °C?
At around -18 °C, the Flat and Outdoor probes have a stated accuracy of ±2 °C. That is useful for an alert, but not sufficient, without verification, for a regulatory record.
In some cases of transporting, warehousing and storing quick-frozen food, Regulation (EC) No 37/2005 requires instruments that comply with the standards it cites. We do not claim that compliance. Read the text.
Check the probe supplied in the set as well: for a freezer, add a suitable probe and let us know when you order.
Probes and devices
Additional probe
Temp-1Wire Flat Probe, 3 m
An HW group probe with a flat cable that passes under the door seal, with a range of -30 to +60 °C.
€87.50 excl. VATFor businesses only. Your EU VAT number is checked at checkout.
Additional probe
Temp-1Wire Outdoor Probe, 3 m
An HW group probe for frozen storage, with a range of -50 to +125 °C.
€100.70 excl. VATFor businesses only. Your EU VAT number is checked at checkout.
NB-IoT, battery-powered
Efento NB-IoT Pack, external probe
A battery-powered wireless data logger in an IP65 enclosure, with a 1 m external probe. The price includes the SIM card and the Efento Cloud software for 5 years, and the sensor is yours to keep.
€216.00 excl. VATFor businesses only. Your EU VAT number is checked at checkout.
Mobile network
ARES12 LTE Set
The device sends its own alerts by SMS, phone call or email, without going through a portal. It comes with a 3 m probe, an antenna and a power supply, and its backup battery lasts about 24 hours in a power cut. All you need to add is a SIM card.
€587.70 excl. VATFor businesses only. Your EU VAT number is checked at checkout.
Frequently asked questions
Will the cable fit through the freezer door?
HW group's Flat probe has a flat cable designed to pass under a door seal. For any other probe, check the cable route before you order.
Which probe comes with HW group sets?
The STE2 LITE comes with a 1 m probe, the STE2 R2 with a 3 m IP67 probe, and the NB-2x1Wire and ARES12 LTE Set with a 3 m probe. The IP67 probe stops at -10 °C, so for frozen storage you need to add a Flat or Outdoor probe.
See also
Cold room temperature alarm: what to set
How to set up a cold room alarm: threshold, delay, defrost and recipients. The right devices, with their prices excl. VAT and their limits.
Find out moreFree template: temperature record sheet and breakdown action plan
A PDF to print: morning and evening readings for a month, and a page for writing down in advance what to do in a breakdown. No registration needed.
Find out moreTemperature monitoring for restaurants and kitchens
Restaurant, hotel, central kitchen: monitor fridges and cold rooms outside service hours and keep a history. Prices shown excl. VAT.
Find out more
Tell us about your site
Let us know what you want to monitor, where it is, and how many fridges or cold rooms are involved. We will reply with a quote.