Vertex Sensor-Mag - Magnetic Probe Holder
The Sensor-Mag Titanium is an acrylic probe holder which employs titanium screw-downs to secure up to three standard probes (each up to 13mm/0.5" dia.). Three equally-spaced round magnets on each side hold the the two sides together and help prevent twisting of the probe holder.Dimensions: Exterior Piece: 68mm/2.7�L x 20mm/0.79"H x 10mm/0.40�W. Interior (Probe) piece: 68mm/2.7�L x 20mm/0.79�H x 26mm/2.0�W I am not going to go on too long about this product because the pictures will pretty much speak for themselves. Again we are looking at polished clear acrylic. The really nice thing about these is the grade 2 titanium screws. We chose this material as it the most anti corrosive material out right now. We wanted to avoid using a nylon or plastic screw that can swell over time and break the probe holder that they are being used in. On smaller tanks some people mount probe holders on the back or side of the tank for easy access. I personally prefer to mount them in my sump, but everybody is different. Since they are the clear polished acrylic they will act like the tank cleaners did and practically disappear from view.