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Dual Display In/Outdoor Thermometer

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Quoting product code: L73AH


About this product


Product overview

• Dual display for indoor and outdoor temperature (°C/°F) • Minimum and maximum temperature memory • Programmable outdoor higher and lower limit temperature alert setting • 3 metre external probe supplied with screw, suction and removavble mounts • Can either be fixed to a wall or table standing

Rated 4 out of 5 by from The instructions aren't great, but it seems to work. As per other reviews, holding in the max/min button resets the stored max/min values. The unit has a temperature alert setting - it beeps for five seconds every minute when the temperature is between the low temperature limit and the high temperature limit. I want it to alert me when the probe temperature is below 0 deg c or above 40 deg c (i.e. outside the range, not inside). You can get the unit to do this by reversing the alert temperatures: Low alert = 0, high alert = 40... the unit beeps when the probe is in the range 0 to 40 deg c Low alert = 40, high alert = 1... the unit beeps when the probe is outside the 0 to 40 range.
Date published: 2013-07-16
Rated 3 out of 5 by from I had the same issue with resetting the max/min readings. The answer seems to be to hold down the max/min button until it bleeps. Could not find a full set of instructions with the unit or online. The alerting process seems a bit bizarre. Still working on that and have asked Maplin to help. Poor start but my opinion of the unit is improving. Which give it a high rating BTW
Date published: 2012-01-08
Rated 5 out of 5 by from Had one of these over 5 years and still working on original battery. For me, best feature is waterproof probe. Has been very reliable for many seasons in greenhouse. Also excellent with probe submerged as I ferment some blackberry wine for christmas.
Date published: 2013-10-19
Rated 1 out of 5 by from There is no way of resetting the max and min temperatures - so you end up with the max and min temps 'of all time' - not very useful . My thermometer now reads a min of -3.2 celsius and if the outside temp does not drop any further, it will still read that in June 2012
Date published: 2011-12-10
Rated 4 out of 5 by from Thanks for those reviews. Had been trying to re-set Max/min setting with no success. Holding down until it bleeps works. Bought this because of very good reviews in Which magazine. Pity it was not in the instructions. However does seem a good product.
Date published: 2013-01-20
Rated 5 out of 5 by from Digital Thermometer Had one of these for over 5 years,great piece of kit.I use mine for taking water temps whilst fishing and it does a great job.Great value.
Date published: 2014-05-03
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Power Specifications

Battery Type:

1 x AAA

Measurement Specifications

Indoor Temperature Range:

-20 to 70 °C°C

Outdoor Temperature Range:

-50 to 70 °C°C

Dimensions & Weight







Do you have a similar thermometer with a higher maximum temperature range, to about 125 deg C?

Asked by: Johnb
On this occasion Maplin do not stock a product that exactly meets your requirements, or indeed anything close enough to offer you as an alternative.
Answered by: Les
Date published: 2016-09-16

what size

Asked by: will
The dimensions for the device and also for the screen size are clearly shown at the bottom of the listing. I have copied them in below for your convenience Display Dimensions: 36 (w) x 16mm (h) Dimensions: 65 (w) x 97 (h) x 20mm (d)
Answered by: Les
Date published: 2015-07-17

Hi, can I extend the temp sensor wire.
Asked by: mal
No sorry this product does not support that.
Answered by: DH
Date published: 2015-07-17

Would the L73AH be suitable for monitoring a fridge and freezer temperature and operate an alarm when a critical temperature is reached.
Asked by: Tony Chantler
No sorry this product does not support that.
Answered by: DH
Date published: 2015-07-17

can it be user calibrated?
Asked by: pete
No sorry this product does not support that.
Answered by: DM
Date published: 2015-07-17

Is the outdoor sensor wirefree or on a cable?
Asked by: Ian
The sensors are wired.
Answered by: PW
Date published: 2015-07-17

Is the device battery operated?
Asked by: Pete
yes it is.
Answered by: TJ
Date published: 2015-07-17

Where can I find a pic of this, i.e. is there a website as I need more info? Thanks.
Asked by: CCDDHH
Picture will be added as soon as available sorry for the inconvenience.
Answered by: JK
Date published: 2015-07-17
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