The Hobbs Active Light Trigger (HALT-1)  was designed in 2015 for the sole purpose of studying road ecology and road tunnel permeability, focusing on 

Ectothermic Species.

 

   * HALT technology provides researchers and scientist reliable data as HALT triggers ensures

100% detectability

(see Statistics)

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HALT-1 has been obsoleted due to improved HALT-2 which requires no 12vdc battery

(see HALT-2)