Product Review: Tramex DL-RHTX FeedBack DataLogger

Tramex are an Irish based company who specialise in the design and production of moisture meters. The product of theirs I will be reviewing within this blog is the DL-RHTX FeedBack DataLogger starter kit along with the associated iOS app. As the kit I was sent did not come with sleeves or a Hygrohood, I am unable to test the Hygro-i2 Hygrometer Probe. In this review I will be assessing how this data logger holds up for use as a device to monitor building humidity for condensation surveys within a social housing context.

The logger comes in two main versions which is the DL-RHTA and the DL-RHTX. The former has a blue frontage and can only measure ambient readings and the latter has a red frontage and can measure both ambient and in-situ readings by connecting a separate probe.

The DL-RHTX is able to provide ambient and in-situ measurements of relative humidity, temperature, dew point and grams per kilo. It boasts an impressive storage capacity of up to 100,000 data point entries which is nearly one years’ worth of measurements using five minute intervals,  which is insane. This is 100 times more capacity than the Protimeter BLE.

After reading the blogs on the Tramex website it seems that one of their marketing demographics are architects, builders and flooring installers who require to monitor the drying out of newly installed concrete slabs. This might explain the need for a larger storage capacity which would not really be needed for condensation and dampness inspections.

Initial impressions

The DL-RHTX FeedBack DataLogger comes with the following:

  • Red labelled data logger
  • Small black ridged carry case
  • Electronic interface cable
  • Hygro-i2 probe
  • Identifying coloured labels
  • A plastic stand and connector


The device has a set of small plastic legs which allows you to place the logger in an upright position and gives that much needed space when fitting the probe attachment to the bottom of the logger. There is a small plastic tab which stops the legs opening beyond a certain angle which I managed to accidentally snap within five minutes of use. This was not the end of the world as I was still able to use the stand regardless of this fact.

The plastic disk that connects the logger to the stand can also double up as a fixing point if you decide to affix the device to a wall. At a first glance the device looks like a robust and rugged as if it could withstand drop damage. Although in reality the plastic casement and stand gives the device a feel which is less robust than its aesthetics let on.

There are also six coloured and six numbered stickers to allow you to give the logger a unique identifying scheme. You can still name the logger when you set it up so this is really a secondary way of identifying which logger you are using and could be helpful if you have multiple loggers set up.

The unit uses a standard AA battery which is very handy as they are easy to get a hold from most shops.


Not many loggers come with a dedicated carry case, to the credit of Tramex this one does. However the black ridged carry case is a touch too small to fit everything in comfortably which turned out to be a bit of an annoyance when transporting the logger about with me.

Set up

First you will set up the data logger itself by removing the plastic battery tab, switching on the button at the top of the device and setting up the little stand. Having an on / off switch is a minor setback for using this device in social housing as the concern will be that it could be turned off whilst still in use.

Setting the unit up using the iOS app can seem a touch complicated at first but after playing about with it for a while and familiarising myself with the different menus it does start to click.

Once you have downloaded the app and have the logger ready you can then proceed with the setting up process. After selecting the device you are at a main screen where you can see the basic readings from the device. From this page you can select the camera function and take a picture with the overlaid measurements which you can save and send. I really think this is a fantastic feature as it gives an excellent snap shot which can help communicate a defect.

Unfortunately once the logger is set up I could not find a way to get back to this screen. It would be good to have this functionality available to return to at any point and not just when the device is being set up. Either way, it is a fantastic and quite a forward thinking idea to have this function included.

Tramex data logger picture function

Tramex have done a really good job for the data analysis and reporting functionality of the app. The detail which can be obtained throughout logging sessions and after completion makes this logger very hard to compete with.

Once you have completed your logging session you can view the log chart through the app. This gives you a chart which allows you to see the dew point, relative humidity and temperature over the logging period.  You can ‘zoom out’ by changing the logging interval slider which is helpful to give a good overview of the results.

You can then export the data by CSV or the chart itself as a JPG file. The addition of the JPG export does easily beat Protimeters functionality but in my opinion it does not quite match Lascars EasyLog software for analysing data.

Chart view of Tramex data


Even given the minor complaints with the logger’s case and stand, the DL-RHTX FeedBack DataLogger still stands up to be a stellar device.

The picture overlay functionality is innovative and the data analysis and reporting features are more than competent. With an impressive storage capacity which outshines many loggers the DL-RHTX places itself as a top competitor for any surveyor when deciding on a device for monitoring environmental conditions within properties.



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