| PartNumber | ZT028LDCTR30 | ZT028LDCTR15 | ZT028LDCTY |
| Description | Audio Indicators & Alerts ALARM+LED 28 Vdc; Loud;Red;Cont.;30sec | Audio Indicators & Alerts ALARM+LED 28 Vdc; Loud;Red;Cont.;15sec | Audio Indicators & Alerts ALARM+LED 28 Vdc; Loud; Yellow; Cont. |
| Manufacturer | Mallory Sonalert | Mallory Sonalert | Mallory Sonalert |
| Product Category | Audio Indicators & Alerts | Audio Indicators & Alerts | Audio Indicators & Alerts |
| RoHS | Y | Y | Y |
| Product | Buzzers | Buzzers | - |
| Sound Pressure Level | 95 dBA | 95 dBA | - |
| Tone | Continuous, 30 s | Continuous, 15 s | - |
| Frequency | 3.7 kHz | 3.7 kHz | - |
| Voltage Rating | 28 V | 28 V | 28 V |
| Current Rating | 40 mA | 40 mA | 40 mA |
| Termination Style | Screw | Screw | - |
| IP Rating | - | - | - |
| Diameter | 30.74 mm | 30.74 mm | - |
| Dimensions | 30.74 mm L x 30.74 mm W x 43.45 mm H | 30.74 mm L x 30.74 mm W x 43.45 mm H | 22 mm L x 22 mm W x 43.5 mm H |
| Mounting | Panel | Panel | - |
| Height | 43.45 mm | 43.45 mm | 43.5 mm |
| Length | 30.74 mm | 30.74 mm | 22 mm |
| Series | ZT | ZT | ZT |
| Width | 30.74 mm | 30.74 mm | 22 mm |
| Brand | Mallory Sonalert | Mallory Sonalert | Mallory Sonalert |
| Length in | 2.234 in | 2.234 in | - |
| Length mm | 56.75 mm | 56.75 mm | - |
| Product Type | Audio Indicators & Alerts | Audio Indicators & Alerts | Audio Indicators & Alerts |
| Factory Pack Quantity | 10 | 10 | 10 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |
| Unit Weight | 1 oz | 1 oz | 1 oz |