Optex HU-3. Optional Optex heating unit for SL-QDM, SL-QDP, SL-QN, AX-TN and AX-TF series barriers. Supplied in pairs Heater unit ax-tf series / ax-tn series / sl-qn series / sl-qdp series / sl-qdm series (pair).

• Optional heating unit for SL-QDM, SL-QDP, SL-QN, AX-TN and AX-TF series barriers.
• Supplied in pairs (one for the transmitting beam and one for the receiving beam)
• 2 sets required for SL series beams
• Must be used in sub-zero temperatures or when frost is present

- OPTEX-219