Series:	ZT
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Driver Circuitry:	Indicator, Internally Driven
Input Type:	DC
Voltage Range:	16 ~ 28V
Frequency:	3.9kHz
Technology:	Piezo
Operating Mode:	Pin Selectable, Visual Indicator
Duration:	Variable
Sound Pressure Level (SPL):	85dB @ 16V, 61cm
Current - Supply:	40mA
Port Location:	Top
Operating Temperature:	-30°C ~ 65°C
Approvals:	cUL, UL
Ratings:	--
Ingress Protection:	NEMA 3R, 4X, 12

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Alarms, Buzzers, and Sirens - ZT028LDMT4R

Introduction

Alarms, buzzers, and sirens are devices used to alert people of a danger or emergency situation. They can also be used to alert people of emergency events such as fire alarms, smoke alarms, and burglar alarms. ZT028LDMT4R is an example of one such device; it is an alarm sounder with a built-in speaker. This device is designed to be installed in densely populated environments and can alert people to danger without any additional external components.

Application Field

ZT028LDMT4R sounders have many applications, including but not limited to:

• Fire alarm systems
• Security alarms
• Emergency exit signs
• Burglar alarms
• Hazard warning systems

These sounders are also commonly used in commercial and residential buildings, airports, hospitals, factories, and other public areas. The device is designed to be easy to install and to work in a variety of environments and conditions.

Working Principle

The ZT028LDMT4R sounder operates by producing an audible alarm when activated. It is powered by two AA batteries, and the alarm sound will continue until the batteries run out or the alarm is manually stopped. The alarm sound ranges from 85dB to 110dB depending on the model, and the alarm can be set to sound when the device is activated, or when it is deactivated. The sounder also features an indicator light, which helps indicate when the alarm is triggered and when it is deactivated. This allows people to be aware of the alarm even if they are unable to hear it. The indicator light can be easily seen in the dark, making it a useful tool for any emergency situation.

Conclusion

The ZT028LDMT4R sounder is a versatile device that can be used to alert people of emergency situations such as fire alarms, smoke alarms, and burglar alarms. It features an audible alarm and an indicator light, and is designed to be easy to install and use in a variety of environments. The device is a useful tool for any emergency situation and can be used in commercial and residential buildings, airports, hospitals, factories, and other public areas.

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Part Number	Manufacturer	Price	Quantity	Description