• Hello From Descent

    The publication date for issue 289 is the 10th of December, meaning subscribers should receive their copies during the week leading up to that date. It is also available from caving suppliers such as Inglesport and Starless River, or from our new website

    New Descent board here:

survey tools


Ooh, well spotted. I've been waiting years for a cheap-enough LDM with serial out to hack into a shetland attack pony. Yet another project to go on the list...


I've now bought one of the UNI-T UT390B chinese LDMs for ?38 delivered (!) from dealextreme. Works fine in my front room. Small, light, robust, but probably not very waterproof. I'll take it to bits for a proper look when I get a mo, and of course take it underground and see how it works there. Then see how hard it would be to integrate with the SAP design.


New member
A startup is manufacturing a bare bones LDM/Mag/Clino/Bluetooth in China.
Currently $99 for the first few.
No screen so will only work with a PDA.
Seems to have a capacitive button.


The CEO has responded that his CTO will provide more details of the accuracy specs but I am still waiting........


I tested my UT390B over new Year in Easgill and it worked nicely, although not in particularly stretching conditions. It did the advertised 30m range. It'll get a proper workout soon on expo.

Meanwhile I noticed UNI-T do a 391A as well which is 70m range and waterproof (IP54) for ?54 delivered from China. That's probably better as a caving device. Has anyone tried one? I guess I'll go shopping anyway.

If these work well on expo I might import a few to supply UK cavers. Would that be of interest or has everyone who cares bought a distoX or distoX2 anyway so the market for separate LDMs is tiny?

I'm a very sad man who now owns 4 LDMs and is about to buy a couple more! I guess that's a lot easier now they don't cost ?250 a throw :)