A modular heater for a conveyor oven has a flange that is removably attachable to the conveyor oven. This debug circuit is configured to test an asynchronous circuit by performing analog measurements on asynchronous signals associated with the asynchronous circuit, and includes a triggering module configured to gate the debug circuit based on one or more of the asynchronous signals. The monomer comprises at least one electron withdrawing substituent and the conjugated diene comprises at least one electron donating substituent. The triggering barrel comprises a stopper located between the first air passage way and the second air passage way of the air chamber.