No electricity or batteries are needed—as your door opens, the magnet and contact disc are separated, sounding a mechanical chime.

This alarm plays a recorded message when it detects someone passing within 6 1/2 feet.

Just like the bells you hear at service stations, these bells ring when a vehicle drives over the attached hose.

Arm and disarm these alarms with a key.

These make great doorbells when used with a push button.

Buzzers meet NEMA 4X for protection and corrosion resistance in washdown environments.

Keep an eye on leaks, overflow, and temperature changes near your equipment, even when you’re offsite.

Sirens can emit both continuous and pulse tones—pulse tones alternate on/off to draw greater attention than continuous tones.

When this horn runs out of air, recharge it with the included pump.

Good for tight spaces where a tower of lights won't fit, these emit three colors from a single lens.

Use a computer to program colors, lighting patterns, and sounds to communicate a variety of status conditions, material levels, and cycle times—these stack lights have 21 colors and 11 sounds.

Lights combine high-visibility strobes with a buzzer that warns workers of hazards even when they’re outside a direct line of sight.

The buzzer warns workers of hazards even when they’re outside a direct line of sight.

These horns produce a sound loud enough to be heard in industrial settings.

Indicate forward or reverse motion with these bells. They mount directly to a vehicle's wheel hub, without switches or wires.

These alarms beep loudly and repeatedly when a vehicle moves in reverse.

Operate low-voltage devices that require less than 48 volts, such as doorbells and buzzers.

In addition to an audible signal, these alarms flash a high-intensity strobe to draw attention during fire emergencies.

When visible smoke particles or carbon monoxide is detected, this stand-alone detector alerts you with an audible alarm.

When this detector senses carbon monoxide, it sends a signal to your control panel and sounds an alarm.

Link multiple detectors in tandem to warn occupants outside the vicinity about potential fire hazards; if one unit is activated, they're all activated.

Provide a signal you can see and hear.

When these detectors sense high levels of hydrogen sulfide, they alert you with an audible alarm, warning light, and vibrating alarm.

When your work area has too much or too little oxygen, these detectors alert you with an audible alarm, warning light, and vibrating alarm.

When these detectors sense high levels of carbon monoxide, they alert you with an audible alarm, warning light, and vibrating alarm.

An audible alarm and warning light alert you to the presence of propane, methane, hydrogen, and carbon monoxide. This detector has a relay for connection to auxiliary alarm systems.

These detectors trigger a “caution” alert when a small amount of hydrogen is detected and a second “danger” alert if levels continue to rise.

Detect alpha, beta, gamma, and X-ray radiation.

Three times more sensitive than standard refrigerant detectors, these infrared detectors can identify leaks as small as 0.03 ounces per year.

Detect halogenated refrigerants such as HFCs, CFCs, and HCFCs. Access hard-to-reach areas with the flexible probe.