BMT-55 4-Hour Mechanical Timer
4-hour manual run and override timer for irrigation pumps, bore pumps, and control panels
The BMT-55 4-hour mechanical timer is a reliable wind-up timer designed for
manual override, extended run control, and pump testing in irrigation, pumping,
agricultural, and industrial control systems.
This mechanical timer allows operators to run a pump, bore pump, water transfer system, or control circuit
for a preset period of up to 4 hours. Once the selected time has elapsed, the timer
automatically switches off, helping reduce the risk of equipment being left running.
Because the BMT-55 is fully mechanical, it requires no external power supply, no programming,
and no electronic controller. Simply turn the dial to the required run time and the timer will
count down automatically.
Used as a manual override timer for irrigation pumps, bore pumps, and water transfer systems,
allowing temporary operation before automatic shutdown.
Key Features
- 4-hour mechanical timer for extended manual run control
- No power required for timer operation
- Ideal as an irrigation pump override timer
- Simple wind-up dial operation
- DPST switch configuration (1NO + 1NC)
- Compact 76 × 76 × 55 mm design for control panels
- Suitable for agricultural, irrigation, and industrial environments
- Reliable mechanical timing with ±10% tolerance
Typical Applications
- Irrigation pump manual run timer
- Bore pump override and testing timer
- Pump control panel override timer
- Water transfer system timer
- Maintenance run timer for pumps and motors
- Industrial equipment run timer
- Ventilation and heater control applications
- General machinery timing control
Technical Specifications
| Feature | Specification |
|---|---|
| Voltage rating | 250 VAC |
| Electrical life | 10,000 operations |
| Rated current | 16 A resistive / 4 A motor |
| Switch configuration | DPST (1NO + 1NC) |
| Timing range | Up to 4 hours |
| Timing tolerance | ±10% |
| Winding torque | 1.5–4.5 kg·cm |
| Manual position torque | 4 daN·cm |
| Terminal type | 6.3 × 0.8 mm silver plated tab terminals |
| Ambient temperature | -10°C to +125°C |
| Standards | EN 60730-2-1 |
| Approvals | BEAB, CSA, SEMKO, IMQ, KEMA, UL, UTE, VDE |
| Dielectric strength | 3750 VAC |
| Dimensions | 76 × 76 × 55 mm |
| Weight | 114 g |
Why Choose the BMT-55 4-Hour Mechanical Timer?
The BMT-55 4-hour mechanical timer is a practical choice for pump control panels where a longer manual run
period is required. Its mechanical wind-up design makes it simple to use in the field, while the DPST switch
configuration supports reliable control wiring for irrigation and industrial applications.
Frequently Asked Questions
What is the BMT-55 4-hour mechanical timer used for?
It is commonly used as a manual override timer for irrigation pumps, bore pumps, water transfer systems,
control panels, and general equipment run control.
Does this 4-hour timer require power?
No. The timer mechanism is fully mechanical and does not require an external power supply for timing operation.
Can it automatically switch off a pump?
Yes. Once the selected time has elapsed, the timer switches off automatically, helping prevent equipment from
being left running longer than intended.
