BMT-55 Mechanical Timer Line-Up for Irrigation Systems
Rugged. Reliable. Built for irrigation.
The Bolec BMT-55 mechanical timer range is designed for dependable timed control in irrigation,
pump, valve and water management applications. Whether you need a short watering cycle,
a general-purpose run-down timer, or a long-duration irrigation timer, the BMT-55 range offers
three practical options to suit different site requirements.
Which BMT-55 Timer Should You Choose?
Each model in the BMT-55 range uses a simple mechanical run-down design. The operator turns
the dial to the required time, the timer runs mechanically, and then automatically returns to zero.
This makes the range ideal for irrigation systems where simple, reliable manual override control
is preferred over complex programming.
BMT-55-4H
0–4 Hours Short Duration Timer
The BMT-55-4H is suited to short-duration irrigation cycles where a longer timer is not required.
It is ideal for short watering periods, solenoid valve control, garden watering and landscaping use.
- 0–4 hour time range
- Short interval control
- Simple mechanical operation
- Automatic run-back to zero
- DPDT switch configuration
BMT-55 120mins
0–120 Minutes General Purpose Timer
The BMT-55 120mins model is a versatile timer for applications that require minute-based
timing rather than long-duration control. It can be used across a wide range of timed control
applications including pumps, ventilation, heaters, ovens and general timed operation.
- 0–120 minute time range
- Useful for shorter manual override periods
- Suitable for pumps and general timed control
- Automatic run-back to zero
- DPDT switch configuration
BMT-55-12H
0–12 Hours Long Duration Timer
The BMT-55-12H is the most popular model in the range and is well suited to longer irrigation
cycles. It is commonly used for irrigation systems, solenoid valves, greenhouse watering,
landscaping and extended pump or valve operation.
- 0–12 hour time range
- Ideal for long-duration irrigation cycles
- Suitable for pumps, valves and water management systems
- Automatic run-back to zero
- DPST switch configuration
Important note: The BMT-55-12H uses a DPST switch configuration,
while the BMT-55-4H and BMT-55 120mins models use DPDT. Please check your wiring
requirements before selecting a replacement timer.
Common Features Across the BMT-55 Range
Although each timer has a different time range, the BMT-55 range shares a rugged mechanical
design and is built for dependable industrial and irrigation use.
- 16A switching rating
- 250Vac rated voltage
- 10,000 operations rated life
- -30°C to 125°C temperature range
- Simple wind-up operation
- No programming required
- Automatic return to zero
Why Mechanical Timers Still Make Sense for Irrigation
In irrigation environments, simplicity matters. A mechanical timer is easy to understand,
easy to operate and does not require complicated programming. This is especially useful for
farms, greenhouses, pump stations and control panels where operators may need a quick manual
override function.
Instead of leaving a pump or valve running indefinitely, the operator can set a defined run time.
Once the time has elapsed, the timer returns to zero automatically. This helps reduce the risk of
equipment being left on by mistake and supports more controlled irrigation operation.
Recommended Applications
| Model | Time Range | Best For | Switch Type |
|---|---|---|---|
| BMT-55-4H | 0–4 hours | Short irrigation cycles, solenoid valves, landscaping | DPDT |
| BMT-55 120mins | 0–120 minutes | General timed control, pumps, ventilation, short manual override | DPDT |
| BMT-55-12H | 0–12 hours | Long-duration irrigation, greenhouses, valve and pump control | DPST |
Final Thoughts
The BMT-55 mechanical timer range gives irrigation operators a simple and reliable way to control
timed operation without electronics or complicated programming. For short watering cycles, the
BMT-55-4H is a practical option. For minute-based timing, the BMT-55 120mins model offers flexible
general-purpose control. For longer irrigation cycles, the BMT-55-12H is the best-selling option
and is especially suited to irrigation, greenhouse and water management systems.
If you are replacing an existing timer, always check the required time range, switch configuration
and wiring requirements before ordering.
Need help selecting the right BMT-55 timer?
Contact Bolec Electronics for assistance with irrigation timers, pump control and replacement timer selection.