The Model 138 manual preset timers are rugged, compact, general purpose units designed for low cost and dependable operation. The time proven motor and gear case is sealed , with all moving parts permanently lubricated for long, service free life. At the end of the time that is set, a double throw switch closes a signal circuit (usually a buzzer) and continues the signal until turned off manually

Manual off - At the end of the time cycle, SPDT switching opens the load circuit and closes a signal circuit. When the knob is turned manually, both circuits are open.

Rugged - This timer is designed for many thousands of cycles, switching up to 20 amps. Ideal for harsh environments and power interruptions

Versatile - A wide range of times available. Isolated power source available

Repeat accuracy - Better than 2% of full scale

Convenient - Set the time and the timer counts down.

Proven reliability - Thousands of these timers have been built into ovens, fryers and similar equipment.