CMF1 mounting fixture is a small round plate with integral rod for mounting one upwards and/or one downwards facing instrument without a ventilation unit. For CMP3, SMP3, CMP6, SMP6, CMP10, SMP10, CMP11, SMP11, CMP21, SMP21, CMP22 and SMP22 pyranometers, CGR3, SGR3, CGR4, SGR4 pyrgeometers and CUV5 and SUV5 broadband UV radiometer. CMF1 has a 88 mm diameter plate with a non-removable mounting rod of 16 mm diameter and 350 mm long. The CMB1 mounting bracket can be used to attach the CMF1 to poles, masts or walls.