Heat sealers are great for increasing production capabilities that involve sealing bags, tubes, and more.
Heat sealers are either an Impulse or Constant-type heat. Impulse heats the wire for a set amount of time whereas the constant heat sealer is always hot.
The construction of your bag will dictate which type of sealer you will need. Impulse-type sealers generally give the best results. However, there are plenty of applications where constant heat may be preferred.