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Heat sealers create secure, tight heat sealing to eliminate sample loss through evaporation and cross-contamination. With superior sample protection, these sealing machines apply pressure and elevated temperatures to close plastic bags for optimal storage in various applications. All of the compact machines are portable with ergonomic designs that reduce operator strain and overall effort required. Simple to maintain and operate, the heat sealers come with timers for complete heating and cooling cycle control. Impulse sealers ideal for sealing film or bag in laboratories make use of heated sealing wires which is triggered when the seal bar is pressed.