How should I dispose of old mercury smoke detectors

SBH

No there is mercury in the detectors 

SBH

First, you need to determine what type of smoke detector you have. Ionisation chamber smoke detectors (ICSDs) contain a small amount of ionising radiation in order to detect the presence of smoke. Because of this radioactive material, ICSDs are categorised as a hazardous substance. For this reason, it's extremely important to properly dispose of old smoke alarms.

After removing its batteries mail the ICSD back to the manufacturer. The address of the supplier is usually listed in the product warranty or user's manual. 

Photoelectric smoke detectors, which use a photo sensor and light beam to detect smoke, do not contain radioactive material  and can be taken to any electronics recycling facility 

Dual or combination smoke detectors have both ionization and photoelectric smoke sensors, so they do contain a tiny amount of radioactive material and should be disposed of in the same way as ICSDs.

If you have the old one that comes from your home you can just throw that away with the waste, but if you have 40 or 50 say from a commercial building them its best to send them back to the manufacturer for disposal

Hope that Helps

Edited by user 03 March 2017 17:34:55(UTC)  | Reason: Spelling