

Silent Knight SD505-AHS Addressable Heat Detector for IntelliKnight Panels
£37.39
The Silent Knight SD505-AHS is a low-profile, addressable heat detector designed for IntelliKnight fire alarm panels. Ideal for commercial spaces, it delivers fast temperature-based detection where smoke detectors aren’t suitable, such as kitchens or boiler rooms.
- Description
- Additional information
- Technical Specification
Description
The Silent Knight SD505-AHS Addressable Heat Detector is engineered for high-reliability temperature-based fire detection in commercial environments. Unlike standard smoke detectors, this heat sensor responds to an absolute temperature threshold—making it ideal for areas where smoke detection may be compromised by steam, cooking fumes, or dust, such as commercial kitchens, laundry rooms, and mechanical spaces.
Part of the IntelliKnight series, the SD505-AHS provides precise temperature data to the control panel and triggers an alarm when its programmed temperature trip point is exceeded. Its intelligent addressable design allows the Silent Knight fire alarm panel to instantly identify the exact location of the triggered sensor, saving crucial time during emergency response.
The unit features a low-profile 2-inch design (including base), a rugged thermistor protected by a specially designed airflow cover, and simple addressing via Silent Knight’s digital protocol. Compatible with the SD505-6AB base, this heat detector is easy to install and highly flexible across multiple building types.
Key Features:
- Low-profile 2” design with universal base compatibility (SD505-6AB)
- Absolute temperature-based detection for accurate fire response
- Ideal for steam-filled or smoky environments where smoke detectors are unsuitable
- Easy digital address setting and communication with IntelliKnight panels
- LED status indicators for normal and alarm conditions
- UL listed, CSFM, MEA listed, FM approved
- Meets NFPA 72 ITM requirements
Whether you’re upgrading an existing Silent Knight system or building a new one, the SD505-AHS provides robust heat detection you can trust.
Additional information
Brand | Silent Knight |
---|---|
Model No | SD505-AHS |
Manufacturer | Honeywell International |
Operating Voltage: | 17 to 41 VDC |
Current Consumption: | |
Standby: | .55 mA |
Alarm: | .55 mA |
Detection Temperature Range: |
135°F to 150°F (57°C TO 65°C) |
Ambient Temperature | 32ºF to 120ºF (0ºC to 49ºC) |
Mounting | 4″ SQR, 4″ OCT Single gang mud ring |
Rated Spacing | 70’ between sensors on smooth ceilings |

Silent Knight SD505-AHS Addressable Heat Detector for IntelliKnight Panels
£37.39
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