OPTEX BX80 detectors 862-01-BX-80NC OPTEX BX80 detectors 862-22-BX-80NRC OPTEX Xwave2 BX 80 wireless outdoor detector 862-01-BX-80NRC OPTEX BX80 detectors 862-01-BX-80NRC-LC OPTEX BX80 wireless ready - low current detector