I've just been to the site to get Cobolt's phone number, and while there checked for other indicators, and this one sounds like just what I'm after, Sensa Cup Level Indicator MK111. Thanks again Sandra for pointing me in the right direction! Darran ----- Original Message ----- From: whizza To: access-uk@xxxxxxxxxxxxx Sent: Friday, November 01, 2013 4:39 PM Subject: [access-uk] Re: Liquid Level Indicators Hi Darren, Got this from the Cobolt website. Seems to be saying that there are two probes, which I think was what you wanted. Cricket Level Indicator (Blue) This unit sits on the rim of the cup, mug, glass etc and gives an audible tone when the liquid reaches the bottom probe, the tone will speed up when the second probe is reached. Powered by 1 x CR2032 Lithium battery. Cricket Level Indicator (Blue) Price £5.75. Is this any good? Cheers, Sandra.