Optex HU-3 Heating Unit AX-70/130/200TN and AX-100/200TF Series

Keep photoelectric beam detectors reliable in freezing weather with the Optex HU-3 heating unit. Built for AX-TN and AX-TF series—and compatible with SL-QDM, SL-QDP and SL-QN beams—this heating unit prevents frost and condensation that can cause false alarms and detection failures. Operating on 24V AC/DC with a maximum draw of 420mA, the HU-3 provides steady temperature control while remaining energy-efficient for security and surveillance installations.

Designed as a wall-mount accessory for both transmitter and receiver housings, the HU-3 installs quickly to protect perimeter monitoring, access control and gate sensor applications. By maintaining optimal beam alignment and sensitivity in sub-zero conditions, it reduces field service calls and extends the life of your photoelectric detectors. Ideal for integrators and facilities managers who need consistent monitoring performance, the Optex HU-3 helps safeguard your security investment in harsh climates.

Add the HU-3 heating unit to your Optex beam installations to improve uptime, lower false alarms and ensure continuous surveillance. Contact us to confirm fitment and order the cold-weather protection your system needs.

• Prevents frost and condensation to maintain accurate beam detection and reduce false alarms
• Extends uptime and reduces maintenance by keeping transmitters and receivers operational in sub-freezing conditions
• Direct compatibility with Optex SL-QDM, SL-QDP, SL-QN and AX-TN/TF series for easy retrofit
• Low-power 24V AC/DC operation with 420mA max draw minimizes impact on existing security power supplies
• Durable wall-mount form factor ideal for outdoor perimeter, gate and access-point surveillance deployments