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Customer Review

19 of 21 people found the following review helpful
2.0 out of 5 stars Worked fine for a while..., 24 Feb. 2009
This review is from: Mastrad Roasting Thermo-Sensor (Kitchen & Home)
I bought this from Amazon in Nov 2007 and have probably only used it half a dozen times. It worked absolutely fine until the other day, when I noticed the joint I was just about to stick in the oven was already showing a temperature of 45 Celsius. The temperature readings have suddenly gone completely wrong. (It's not set to Fahrenheit, I did check). Removing the battery and resetting everything I could didnt help, its still showing room temp in my fairly chilly kitchen somewhere in the sweltering 50 Celsius range.

I can't believe it broke after so little use. In the end the roast was ruined as I've come to rely on the thermometer so hadn't weighed the joint nor noted the time it went in the oven.
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Showing 1-2 of 2 posts in this discussion
Initial post: 1 Apr 2009 19:30:56 BDT
Last edited by the author on 1 Apr 2009 19:37:56 BDT
Bernie V says:
Whilst certainly agreeing that probes should have a much longer life than you have experienced I would make the following note, which could be useful to some readers.

TESTING TEMPERATURE PROBES, quick, easy, and used in the industry:
Professional probes should be always be calibrated and recorded against 'test caps' to ensure the unit is reading the correct temp (both -18c and +2c are common combined tests in the UK). Whilst this isn't neccesary for home use, you can and SHOULD do another industry test; this is known as the 'Iced and Boiling Water Test'. This is based on the fact that even if the base unit is fine (proved by using test caps), the wire and probe may have become damaged. Industry practice tests this quite simply and you can too...
Boil a kettle, enter the probe, and read the result - this should be within 2 degrees of +100C. Similarly for testing chilled goods, take a container and fill with ice, then water, wait a while, and then probe which should return a result within 2 degrees of 0 degrees C.

If you want to know your probe is working OK then the water tests are a relatively reliable way to ensure that the entire unit is working properly - if you're only worried about hot food then how easy is it to boil your kettle and read off the result - giving you peace of mind that your equipment shouldn't cause you harm if you're trusting it for food safety.

Hope this helps anyone that is wondering if their kit is really doing its job correctly!

In reply to an earlier post on 15 Jul 2009 22:58:17 BDT
I noticed my thermometer was displaying poor results too so I dipped it in boiling water for a lengh of time to see how close it would get to 100oC. It hardly passed 40oC. I will now have to contact Mastrad and moan about a poor product and if I can have a replacement (lead?). Either way, it's effort you shoudln't have to make as a consumer.
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