Hardline Products USA Vibration Activated Hour Meter – Wireless Waterproof Maintenance Tracker for Compressors, Electric Motors, Trailers, PTOs & Diesel Equipment – Peel & Stick Installation

I was skeptical about this meter after reading some of the reviews, I very happy that I bought it. It came with zero hours on the meter as expected and has a small tab that you remove once mounted. It starts adding hours only after the tab is removed. I have it mounted on a Porter Cable vertical oil bath/piston air compressor. It works as expected and has been accurately counting hours since installed. I've only observed it working while the compressor is running, not "when a bus drives by" like some reviews I read. The cost of the meter is small when compared to the cost of the compressor. It's cheap insurance and helps me to track maintenance on the motor. I have a similar meter installed on my Honda generator but it uses a signal off the spark plug wire, same brand/manufacture and its been working great for several years. I expect the same from this unit.

I purchased this meter for my new air compressor. At this point it seems ideal for the application (stationary motorized equipment) and appears to work as advertised. It seems well built and rugged. I tried running several loud engine driven items (lawn mower, rotary tiller) next to it and couldn't activate the meter, so it would appear that the meter will accurately measure the operating time of the compressor.

I placed this on my Air Venturi Nomad II PCP Air Compressor and it has worked well keeping track of its use.

Purchased to use to monitor run time on portable generator. Unfortunately, the amount of vibration the generator created was not consistent enough to give a valid count. Great product, but for my use, did not work. Had to return.

I strongly recommend you first test this meter, using a temporary mount of tape or velcro, before drilling holes and permanently mounting it with the provided screws. The meter I received was defective even though it initialized and the display zero'd out exactly as the instructions described and seemed to be perfectly functional. I am glad that I did NOT just trust it at that point. After zeroing it, I next attached it with velcro to a flat horizontal surface, for maximum sensitivity, as per the instructions, on a new 4-stroke inverter generator. After 5.5 hrs of run time it still registered 0.0 hrs. Although the meter was visibly vibrating like crazy from the generator, it didn't register any time. I thought maybe the velcro was cushioning it too much, so I separated it from the velcro hook portion and placed it directly on to the generator surface... still nothing. I returned it for a refund. I am assuming I am just the unlucky customer who received the "1 in a thousand" defective meters, otherwise I would give it 1 star. It is a great product concept and the waterproof design is why I originally purchased it.

Very easy to install and activate. Works perfectly. I used it to see how many hours my compressor for my fire protection system is running. I attached it to the electric motor on the compressor.

Wouldn't reliably pick up vibration mounted on the inside of an aircraft. Probably good for generators, pressure washers, something with a little stronger vibration

Does not work. Tried different locations and positions but unit would seldom respond.