HSI Fire & Safety Group offers the fire alarm test and maintenance professional a full line of detector test equipment and accessories for functional testing of smoke, carbon monoxide and heat detectors to comply with international fire codes and standards. Choose from our Open or Enclosed Delivery test equipment or our new Versa-Tools™ test equipment. All Versa-Tools™ Equipment are 100% Lifetime Guaranteed. Each delivers proven reliability and value. Plus, our UL listed and approved aerosols provide the lowest cost per test!