Garmin Heart Rate Monitor with Oregon 400t

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Paring the Heart Rate monitor with the Oregon 400t is relatively easy. On the Oregon 400t select Setup -> Fitness -> Heart Rate monitor
Once that is done, the Oregon 400t will search for the Heart Rate Monitor.  In order for the paring to work properly for the first time, the Heart Rate monitor must be don by wetting some water on the inner side of the sensor which is on the left and right of the strap. After that is done, there is no need to pair both units in future again.The Receiver will show reading only if your body had some moisture so do not worry if you are not seeing any reading.

In order for to see the "bpm" readings on the Map mode on your Oregon 400t. You will have to go Setup-> Map -> Show Data Fields Always -> Always.
Go back to Map mode select any of the nav bar on the top and choose "Heart Rate"
There is no "ON" or "OFF" switch on the Heart Rate monitor, it is auto 'ON' once the receiver found the signal from the Heart Rate monitor but you must set it to 'ON'. 
It is best that you either configure the Fitness Profile or create another Profile when use with the Heart Rate monitor. This will allow the Oregon 400t to search the Heart Rate monitor automatically at that profile. On the Oregon 400t Setup / Fitness, set the Heart Rate monitor to "ON". So every time when you switch the selected fitness profile, Oregon 400t will automatically search for the Heart Rate monitor.
The Heart Rate monitor weighs around 55gm
Battery type: CR2032


  1. Cool blog! I just stumbled on it and now I’m a dedicated reader. If you have free time you might want to check out sports shops.

  2. I'm very curious; I have an Oregon 400t GPS, and I'm thinking about getting the heart rate monitor for it. The bike cadence sensor might follow, eventually.

    From the reviews I'm reading ( since I can't find a demo heart monitor locally ) I see that your heart rate can be added as a data field, like your moving time, average speed, et cetera. This would be useful, but only somewhat useful.

    Is your heart-rate added to your tracks? In other words, can you go back and see that your heart was working much harder when you were climbing a hill, and that it took a certain amount of time for you to relax back to normal? Can you do anything like the elevation plot with your heart rate ... even if it has to be done on the computer?

  3. The Garmin Oregon 400t GPS is a great device. I've written a short writeup of my experiences and how to use it with some really great free software here:

    I've outlined four great free resources and website that enable you to pre-plot routes, show tracks travelled and upload / download GPX files easily to your Garmin Oregon 400t. is a particularly great web site with a whole host of free features that making walking / treking offroad easy and a joy.