Bolec Electronics

02/10/2026

Take control of solenoid timing with the Bolec TM301HD-30A.

This 12 VDC heavy-duty timer relay provides an adjustable pull-in pulse for compatible three-wire diesel fuel solenoids, while the hold coil remains powered from the switched run supply.

✅ 30 A nominal relay rating
✅ Adjustable timing in seconds or minutes
✅ Delay-on, timed output and continuous cycling modes
✅ DIP-switch settings and clearly identified terminals

Contact Bolec for help matching the timer to your solenoid’s pull-in current and switching requirements.

📧 [email protected]

View product details and order online:
https://bolec.com.au/product/tm301hd-30a-heavy-duty-solenoid-timer-relay-12-dc-30a/

TM301HD-30A heavy-duty 12V DC timer with 30A relay for solenoids, valves, actuators, irrigation, automotive and industrial applications.

30/09/2026

An old Deutz engine deserves a control panel that’s built for the job. 🔧

For a Victorian irrigation application, we configured a custom **BEM502IRN Dual Pressure** panel to replace an ageing watchdog panel. It brings together two pump pressure monitoring points, three mechanical Murphy switch gauges, a tachometer and an hour meter.

The built-in startup delay also helps prevent false low-pressure alarms while the pump comes up to pressure.

Have an older engine panel that needs replacing? We can assess the existing setup and build a panel around your application.

Read the story: https://bolec.com.au/murphy-to-bem502dp/

From an ageing watchdog panel to a custom Bolec BEM502IRN Dual Pressure configuration. The retrofit Giving an older engine a practical new control panel The original panel on this older Deutz engine had a mechanical timer, Murphy pressure and temperature instruments, a start/run toggle and other con...

02/09/2026

Not sure which timer relay suits your application?

We’ve put together a practical comparison of the:

⚙️ Bolec TM301 — compact 12/24V multifunction timer
💪 TM301HD 12VDC — 30A heavy-duty model
💪 TM301HD 24VDC — 30A heavy-duty model
🔴 REDARC TIM05 and TIM06 — specialised relay-socket timers

The guide compares timing functions, output types, current ratings, wiring differences and pricing—without claiming that one product is best for every job.

Whether you need delay ON, delay OFF, a temporary output, continuous cycling or starter-solenoid protection, this guide will help you choose the right timer for the circuit.

Read the complete guide:
https://bolec.com.au/12v-24v-timer-relay-guide/

Not sure which model you need? Send us the supply voltage, load current, trigger method and required timing sequence.

📞 0480 312 400
✉️ [email protected]

03/08/2026

🔧 New ERB205 Ratio Calculator Now Available

Setting up the Bolec ERB205 Electronic Ratio Box is now much easier.

Simply enter:

✅ The current speedometer or tachometer reading
✅ The correct or desired reading

The calculator will automatically display:

• The nearest ERB205 correction ratio
• The correct switch number
• The eight-digit binary setting
• The ON/OFF position for all eight DIP switches
• The predicted corrected reading

The ERB205 can be used to correct compatible electronic speedometer and tachometer signals following changes to tyre size, differential ratio, transmission, engine, ECU or dashboard.

Try the calculator and see the full setup guide here:

https://bolec.com.au/erb205-ratio-calculator-find-the-correct-dip-switch-setting-for-speedometer-and-tachometer-correction/

Please confirm signal compatibility before installation.

New online setting tool ERB205 Ratio Calculator: Find the Correct DIP Switch Setting Correcting a speedometer or tachometer signal is now much easier. Enter the current reading and the desired reading, and the ERB205 calculator displays the nearest ratio, binary code and all eight DIP switch positio...

20/07/2026

⚠️ Could a $300 speed switch save thousands in downtime?

When a conveyor slips, a pump shaft breaks or a crusher stalls, every minute counts.

The BOLEC SS501 continuously monitors shaft speed and can trigger an alarm or automatic shutdown before equipment damage occurs.

Designed for:
✔ Conveyor Systems
✔ Crushers
✔ Dewatering Pumps
✔ Diesel Engines
✔ Industrial Machinery

With dual independent channels, adjustable trip points and support for Hall Effect or Magnetic Pickup sensors, the SS501 is a flexible solution for a wide range of industrial applications.

📩 Get in touch with our team to find out how the SS501 can protect your equipment.

28/04/2026

Protecting Specialty Vehicles Where Water Matters

From emergency service units to irrigation vehicles and mobile water systems, low water levels can quickly lead to costly downtime, pump damage and operational disruption.

The Bolec WL701 Low Water Level Alarm Kit is designed to help protect specialty vehicles by providing clear warning before low water conditions become expensive failures.

Ideal for:

* Emergency vehicles
* Water carts
* Irrigation systems
* Council fleets
* Service vehicles

Built for practical Australian conditions, WL701 supports smarter fleet reliability through simple, effective protection.

Learn more:
https://bolec.com.au/product/bolec-wl701-low-coolant-level-alarm-kit-with-probe/

24/04/2026

Which BMT-55 timer is right for your irrigation setup? 💧

We’ve just put together a full breakdown of our BMT-55 mechanical timer range — designed for simple, reliable control of pumps, valves and irrigation systems.

🔹 BMT-55-4H (0–4 hours)
Perfect for short irrigation cycles and quick manual override

🔹 BMT-55 120mins (0–120 minutes)
Flexible option for general timed control and pump operation

🔹 BMT-55-12H (0–12 hours) – BEST SELLER ⭐
Ideal for long-duration irrigation, greenhouses and water management

⚠️ Important:
The 12H model uses DPST, while the others use DPDT — make sure to check your wiring before selecting.

✔ No programming required
✔ Mechanical & reliable
✔ Automatic run-back to zero

If you're still using old or unreliable timers, this is one of the simplest upgrades you can make.

👉 Read the full breakdown:
https://bolec.com.au/bmt-55-mechanical-timer-line-up-for-irrigation-systems/

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...

21/04/2026

Most pump failures don’t start with the pump.

They start with simple things:
• Systems left running too long
• No protection in place
• Low water levels going unnoticed

Small control issues → Expensive failures.

We see this all the time in irrigation and fire pump systems.

The good news?
Most of it is preventable with simple, reliable control solutions.

👉 Keep your pumps running — explore our irrigation solutions:

Stop Pump Failures Before They Start   Most pump failures don’t start with the pump itself. They start with simple control issues that go unnoticed until it’s too late.   Common Causes of Pump Failure Systems left running too long No shutdown delay or timer protection Low water levels going un...

15/04/2026

Protect Your Engine Before It’s Too Late

Engine damage caused by coolant loss can happen faster than many drivers realise.
By the time your temperature gauge reacts, the damage may already be done.

A dedicated low coolant alarm gives you an earlier warning—when it matters most.

The Bolec WL701 is designed to provide simple, reliable protection for 4WDs, diesel vehicles, agricultural equipment, and other hard-working machines where engine reliability matters.

If you want added peace of mind before your next trip, workday, or remote drive:

👉 View the WL701 product page here:
https://bolec.com.au/wl701/

Protect your engine before a minor coolant leak becomes a major repair bill.

✓ Detects sudden coolant loss✓ Built-in buzzer alarm✓ Relay output for shutdown systems✓ 7 second slosh delay✓ 12V / 24V compatible✓ Easy installation

14/04/2026

Built from real-world customer demand 💡

Our BEM502IRN Dual Pressure Model was originally developed following a request from an irrigation installer in Bundaberg, QLD who needed reliable dual pump pressure monitoring for a diesel irrigation application.

What began as a custom modification of our proven BEM502IRN watchdog platform has now become part of the standard Bolec product range.

✔ Dual pump pressure shutdown
✔ Murphy gauge configuration
✔ Intelligent watchdog fault memory
✔ IP56-rated enclosure
✔ Designed for harsh irrigation environments

At Bolec, many of our best products start with customer feedback from the field.

Need a modified control or engine protection solution?
Talk to us — if it’s not in the catalogue, we may still be able to build it.

📧 [email protected]
🌐 https://bolec.com.au/product/bem502irn-dual-pump-engine-protection-panel/