supply of 20-gram sensing and actuation device , supply and installation of a bulb thermal actuator, designed for a temperature range of 68 - 72 degree celsius, model no: tad-in by pyrogen, along with a buy-back discount for the current bulb thermal actuator. [ warranty period: 30 months after t he date of delivery ] ] , the supply and installation of a 20-gram sensing and actuation device of the pyrogen brand, aerosol units, with a tem perature range of 68 - 72 degree celsius, includes a buyback discount for the existing pyrogen make sensing and actuation device o f 20 grams, which has a temperature range of 94 - 104 degree celsius, model number: exa-m-z2. [ warranty period: 30 months a fter the date of delivery ] ]