Operational conditions
Operating temperature (T-T)	0 - 45 °C
Weight & dimensions
Width	170.5 mm
Depth	168.8 mm
Height	130.2 mm
Weight	700 g

The APC NetBotz smoke sensor NBES0307 is a room sensor of the NetBotz series, specifically designed for smoke detection in IT environments. It serves as an additional safety measure alongside existing fire protection systems and is intended for mounting in server racks and IT enclosures. The sensor features an integrated cable length of 10 feet (approx. 3.05 m), enabling flexible placement in close proximity to sensitive IT infrastructures. Connection is via wired connectivity, and the cable length can be extended as needed using RJ-45 couplers and standard CAT-5 cables up to 30.5 m (100 ft).

Applications

The sensor is designed for use in IT environments such as data centres, server rooms, and IT enclosures. It detects smoke development early to prevent damage to IT systems caused by fires. Mounting is ideally done in the upper zone of the rack, as smoke rises and is detected most quickly there. The installation width is 170.5 mm, depth 168.8 mm, and height 130.2 mm, with the sensor occupying one U space. The operating temperature ranges from 0 to 45 °C, enabling use in typical IT rooms with climate control. Relative humidity during operation can reach up to 95 % without affecting functionality.

Functions and Equipment in Detail

The sensor is based on a photoelectric smoke detector, using either a Horing LIH model AH-0621-4 or a Sentek model SD119-4(24V) depending on configuration. This technology detects smoke particles via scattered light measurement and is particularly suitable for identifying slow-burning fires, which often occur in IT environments. In alarm state, both LEDs flash red simultaneously, providing a visual warning. The integrated cable length of 10 feet (3.05 m) allows for flexible placement, with extension possible up to 30.5 m via RJ-45 couplers and CAT-5 cables. The delivery includes cable ties and rack mounting brackets for securing the sensor in the rack. Additionally, M4 x 8 pan-head screws, M6 black plastic cup washers, M6 x 16 Phillips screws, M3 knurled thumb nuts, 203-mm (8-in) tie wraps, self-adhesive cable holders, and M3 x 12 stud fasteners are included to facilitate installation.

Technology Explained Simply

The photoelectric technology works by directing a light beam toward a detector. When smoke particles are present, the light is scattered, causing the detector to register a change and trigger an alarm. This method is especially sensitive to smoke that rises slowly, such as that produced by electronic devices or cables. The 10-foot (3.05 m) cable length is sufficient to position the sensor near IT systems without requiring additional extensions. Extension via RJ-45 couplers and CAT-5 cables allows flexible adaptation to larger racks. Installation is done using the included brackets and screws, with the mounting screws and washers ensuring mechanical stability.

Compatibility and Accessories

The sensor is intended for use with compatible sensor connections on NetBotz products. Exact compatibility is described in the respective NetBotz product documentation. Cable length extension via RJ-45 couplers and CAT-5 cables is possible, with a maximum length of 30.5 m (100 ft). The included mounting accessories, such as cable ties, brackets, and screws, enable secure installation in the rack. The use of self-adhesive cable holders and tie wraps ensures proper cable routing.

Installation and Mounting

Mounting is done in the upper zone of the rack, as smoke rises and is detected most quickly there. The sensor occupies one U space and is secured using the included mounting brackets and screws. The 10-foot (3.05 m) cable length allows for flexible placement, with extension up to 30.5 m possible via RJ-45 couplers and CAT-5 cables. Cable routing is secured using the included cable ties and self-adhesive cable holders. Installation follows the instructions in the included manual, which may vary depending on the model (Horing LIH or Sentek).

Operational Advantages

The sensor provides reliable early smoke detection in IT environments, helping to prevent damage to sensitive IT systems. The integrated 10-foot (3.05 m) cable length allows for flexible placement, with extension up to 30.5 m possible. Installation is simple and uses the included brackets and screws. The visual alarm indication via red LEDs ensures a quick response. The operating temperature range of 0 to 45 °C and relative humidity up to 95 % make the sensor suitable for typical IT environments. The delivery includes all necessary mounting accessories to ensure safe and orderly installation.