monitors and is activated by magnetic strips 19 these magnetic strips are strategically located on the tape to initiate deceleration leveling and stopping for each floor in response to commands issued by the car control and selector panel not illustrated in detail herein the tape guides 44 such as illustrated in fig4 6 comprise two separate tape guide members 44a and 44b each of these members are attached to the side 46 of the sensing head housing 48 each of the members 44a and 44b is provided with an elongated slot for receiving the tape 18 as noted in fig6 as also noted in fig5 the members 44a and 44b are supported within the housing 48 and do not extend thereabove or therebelow in the view of fig5 in this way there is thus no cantilever action by virtue of extending a guide above the housing also the securing of the guides is more reliable by virtue of having separate guide members each secured to a side of the housing rather than you using a single piece guide secured to the back of the housing as in the prior art the sensing housing 48 is a two piece housing including elongated channel members 50 and 52 in this regard note the cross sectional view of fig6 which shows the channel members 50 and 52 interlocked forming a housing with the guide members 44a and 44b on the outside thereof the entire assembly including the guide members and the housing members are secured together preferably by thumb screws 54 it is noted that the guide members 44a and 44b are provided with partially tapered holes for accommodating the thumb screws so as to aid in the centering thereof fig7 is a cross sectional view taken along line 7.