Features:2" NPS Plug Mounting Type.With attached feeding tube guarantee the alarm stays with the feed pipe so an operator cannot forget it.Your tubing is secured with a polypropylene compression fitting to eliminate chance hose disconnection or air leaks.Float switch is protected inside a rigid pipe so it can get knocked around without worry.Adjustable depth with no tools required. Just loosen the thumb knob and slide the pipe to set the desired depth.Uninterruptible battery power works through power failures, can't come unplugged.Polypropylene is the standard material because it is suitable for almost all chemicals, it has very good toughness, and will tolerate temperatures up to 200°F.Built for tough industrial environments. Waterproof, acid -proof, PVC housing, with Lexan LED lens, stainless steel buzzer diaphragm.Always on duty because the liquid suction tube is permanently attached to the alarm unit.It can go anywhere because its battery powered. No need for power outlets.Uninterruptible battery power lasts for years. Lithium battery included.Loud warbling tone cuts through the loudest industrial noise.Rugged. Built for rough, wet and corrosive environments.Transfer to a drum is easy: no need to fiddle around with tube connections.A functional check is simple – just lift the Drum Alarm out of the drum.No wetted metal parts.Has a threaded drum plug mount. NPS thread.Working depth is adjustable from 2-7 inches using a thumbscrew.Liquid feed pipe is removable to allow the drum plug to unscrewed without winding the liquid tubing.Chemical Resistance:Aqueous Ammonia (conc.)Aqueous solutions to 100°CHydrochloric acid (conc.)Nitric acid (30%)Oils (including waste oils)Potassium carbonate (40%)Sodium hydroxide (50%)Sulfuric acid 70%Sodium HypochloriteOur overfill alarms for drums lets you pump liquids into chemical drums and containers without having to check the level. When the level gets above the float switch, a loud buzzer sounds and LED flashes to let you know. Easy to install the high level Drum Alarm: once the battery is installed, simply drop it into a drum and you're ready to go! No wiring. Lets you forget about overfilling for good. These liquid level alarms can be adapted to any drum.