Profile: Caledon Controls Ltd. is a manufacturer of thyristor controllers. We are certified with ISO 9001:2000 certification. We also manufacture associated instrumentation including load sequencing controllers for use in process heating applications and single cycle controllers. Our high power thyristor stacks are employed for heating applications in furnaces, ovens, dryers and process heating. We avail a range of thyristor stacks designed for burst fire control of transformer coupled loads. This requires a special switch-on sequence to avoid transformer in rush current. On the other hand we also cater with a range of thyristor stacks designed for phase angle or soft start burst fire control of complex or transformer coupled loads. These stacks have communications capability and multiple control strategies.