Customer Message - Coronavirus *** Updated 15 April 2021 ***

We are continuing to process and dispatch orders as normal and goods will be sent using your requested delivery service. However, we understand that customers in certain areas may experience some minor delivery delays due to courier workloads. Please bear this in mind when placing an order.

We would like to thank all our customers who have continued to use our services and worked with us throughout this difficult time.

Comark DT400 Waterproof Digital Thermometer (with User Calibration Function)

This thermometer can be used in a commercial dishwasher and has a thin tip for fast response (better than 6 seconds). It is switchable between °F and °C and has maximum temperature hold and auto power off features.
Ref: DT400

Availability: In stock

Regular Price: £21.60

Special Price Excl. VAT: £13.00 Incl. VAT: £15.60

UKAS Certificates are available for this Instrument
For more information click here...
We can also provide certificates at other temperature points.

Please contact us to discuss your requirements...

Note: Instruments are calibrated to order and will be despatched in 5 to 10 working days.

Product Description


This thermometer can be used in a commercial dishwasher and has a thin tip for fast response (better than 6 seconds). It is switchable between °F and °C and has maximum temperature hold and auto power off features.

The thermometer can be calibrated at any time by the user following the procedure outlined at the bottom of this page.

The casing is made with BioCote® Antimicrobial Protection to provide an important extra level of defence against cross-contamination.

Measuring food temps is quick and easy with Comark DT400 Waterproof Pocket Digital Thermometer. Not only is this pocket unit highly accurate (to ±0.5°C/1°F) in temperatures ranging from -20°C to +200°C, it can also be field-calibrated as needed. When you use this unit through the dishwasher, it can record the maximum water temperature so you can check that dishes are being properly sanitised. The unit's thin tip displays readings within 6 secs. Other benefits include an automatic power-off function that saves batteries, and BioCote antimicrobial protection to help keep it clean.

Typical uses for this thermometer include food and water testing making it ideal for caterers, bakers, food manufacturers as well as home users.

How to Calibrate the Comark DT400

The DT400 can be calibrated at any time by the user. The procedure is quick and simple:

1. Put some water and crushed ice into a clean mug or water bath (approx 60% crushed ice to 40% water).

2. Insert the thermometer into the ice solution until the stem is covered to at least half way along its length.

3. Wait for the reading to settle.

4. Press and hold the D-H button for 8 seconds to begin calibration.

5. "CAL" will be displayed on the LCD screen and calibration at 0°C will be complete.


Additional Information

Type Digital
Features Hold Function, Pocket, Pocket Clip, Waterproof
Range -20°C to +200°C
Accuracy ±0.5°C
Resolution 0.1°C
Scale Celsius, Fahrenheit
Sensor Type -
Battery 1.5 Volt LR44
Battery Life -
Display LCD
Colour Blue
Dimensions -
Weight -
Manufacturer Comark
Manufacturer's Code DT400
Additional Keywords -


Customer Reviews (14)

Buy OneReview by Dave B
Fantastic thermometer which is easy to use and I don't have to worry about getting it wet.

Very useful and appears to be very accurate, but ready to calibrate anyway. Quick delivery. (Posted on 14/05/2015)
Brilliant ServiceReview by Name Withheld
Got this to carry out tap temperature test. Quick Service no problem. (Posted on 05/05/2014)
Fabulous little piece of equipment.Review by Christine - Binfield
Effective,quick, accurate and easy to use. A little gem. (Posted on 20/04/2014)
Excellent Service And Product.Review by Dave - Aberdeen
Ordered this at 10.49 hours yesterday and arrived in less than 24 hours. Nice to see service like that and will buy from here again. The thermometer does the business intended and has multiple uses in the home. Thanks (Posted on 02/04/2014)
accurate and convenient to useReview by Mike Baker - Colchester
Does what is claimed; checked calibration on receipt - seems spot on. Very useful for general culinary purposes - I use it mostly for water temp. in bread-making. A detached probe would be more comfortable for jam-making! - but a glove helps. Slightly odd aesthetic and colour; very good value. (Posted on 10/03/2014)
Excellent device.Review by Anon
This thermometer is very easy to use, it is very quick in response and easy to carry around or store due to light weight. The customer service is absolutely outstanding. They have solved a problem for me while being very friendly and even covering the extra postage costs. Thumbs up!! (Posted on 16/11/2013)
Portable and discreetReview by Simon - Aylesbury
Very useful for measuring beer temparatures in pubs as part of CAMRA beer quality surveys - this can be done discreetly without attracting attention. I like it a lot. (Posted on 11/11/2013)
Excellent product and excellent serviceReview by Anon
Would definitely recommend this item. (Posted on 10/11/2013)
Excellent.Review by anonymous
Easy to use and responds when moved between hot and cold taps. Bought to test water temperature as part of legionella control (Posted on 28/10/2013)
Thoroughly recommended.Review by Bill - Nottingham
Great service and a great product. I use mine for homebrewing and it's perfect. Build quality is good too. (Posted on 02/09/2013)
Excellent product at an excellent price.Review by Mark - Leeds
Great service from the company for starters with overnight delivery and good packaging. The thermometer itself is a breeze to use, very responsive and accurate when compared to my laboratory spirit thermometers. Looks to be a very robust unit that will last. (Posted on 01/09/2013)
Great Product,Great Price.Review by Nigel Portman - South Wales.
What more can I say ? Great Service too. Tidy little tool. (Posted on 11/08/2013)
Great Product!Review by karen - newcastle upon tyne
This company is fab first time I have used them Would reccomend. Lady on phone was very helpful.My order came the next day less than 24 hours after placing it. shame all companys I deal with arent like this (Posted on 16/07/2013)
Robust, easy to use and clear to read thermometerReview by Paul Kendall - Dereham, Norfolk, UK
Compact, easily sterilised unit, that displays current value or maximum temperature reached via memory recall. Fully submersible design that responds to temperature changes quickly. For my intended use, it would have been helpful if minimum temperature reached was also able to be recalled. (Posted on 21/02/2013)

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