Abstract: An all electronic, no moving parts, low cost, warning system, quickly and reliably alerts operator of malfunctions in levels, temperatures and pressures on trucks, farm implements, autos, boats, aircrafts, machinery, etc., which if not immediately attended to, may cause costly damage or even loss of life. Specifically gives aural and visual warning for: Low brake-fluid level, low transmission-fluid level, low engine-oil level, low differential-oil level, low coolant level, even low windshield-washer-fluid level, low fuel level, engine overtemperature, engine oil-pressure loss, loss of vacuum for power-brake assist, etc., in any single function, combination or extension, as pertaining to a particular truck, farm implement, auto, boat, aircraft, or similar machinery, all this being done by means of all-electronic parts, resulting into high reliability.