Case Study • Transfer Pumps × Bolec
Safer, Smarter Transfer Pump Setups
Stop overfill, prevent dry-run damage, and protect engine-driven pump sets with three simple add-ons:
a timer (auto stop), a level alarm (early warning), and an engine monitor (warn/stop).
Common problems
- Forgotten shut-off → overfill & cleanup
- Dry-run when level drops unexpectedly
- No clear engine warnings on pump sets
Customer-style outcomes (no fake quotes)
- Auto stop after set time
- Early alarm before damage
- Warn/stop on engine fault
Track what changes
- Overfill incidents ↓
- Pumps replaced due to dry-run ↓
- Unplanned downtime ↓
Recommended add-ons (2×2 layout)
Timer → Level alarm → Engine monitor → Coolant level. Two cards per row for clean balance.
TM301 Delay Timer (12–24VDC)
Auto shut-off after a set time—prevents overfill and “left on” mistakes.
Auto stop
Programmable
Compact relay
Programmable
Compact relay
WL601 Low Water Level Alarm
Audible/visual alert when tank level drops—helps avoid dry-run damage.
7 s delay
Buzzer/Light
12/24V
Buzzer/Light
12/24V
WL701 Low Coolant Level Alarm (Probe)
Probe-based coolant protection—ideal for engine-driven sets.
Probe incl.
Engine safe
12/24V
Engine safe
12/24V
BEM502IRN IRN Engine Monitor
Monitors oil pressure, temperature, RPM & charge. Configurable alarm/stop outputs for failsafe protection on engine-driven pumps.
Warn/Stop
Oil/Temp/RPM
12/24V
Oil/Temp/RPM
12/24V
How it works (quick playbook)
Auto stop with TM301
- Wire TM301 relay in series with pump power/control.
- Set desired run time (e.g., 30 min).
- Relay opens after time → pump stops.
Prevent dry-run with WL601
- Install float/probe at minimum safe level.
- Wire buzzer/light (optional stop interlock).
- Use built-in delay to avoid nuisance alarms.
Protect engines with IRN + WL701
- Connect sensors (oil, temp, RPM, charge).
- Add WL701 probe for coolant level.
- Configure outputs for warn/stop on faults.
Images & product links:
TM301 ·
WL601 ·
WL701 ·
IRN Engine Monitor (BEM502IRN family)
Outcome-style copy—no fabricated testimonials.
TM301 ·
WL601 ·
WL701 ·
IRN Engine Monitor (BEM502IRN family)
Outcome-style copy—no fabricated testimonials.