Most of the operating cost of tracing.

An uncontrolled circuit runs continuously.

It heats whether or not the pipe needs it.

Control energises only when required.

On long circuits that repays quickly.

It also extends cable life.

Simplicity against saving and precision.

Ambient measures outside air and switches groups.

It is cheap and deliberately conservative.

Line sensing measures each pipe individually.

It saves more and holds maintain temperatures.

It needs a sensor per circuit.

When a maintain temperature must be held.

Process fluids need a specific temperature.

Ambient sensing cannot know the pipe's state.

Freeze protection alone rarely requires it.

Viscosity maintenance always does.

Decide from the duty, not the budget.

Closer temperature holding.

Output varies rather than switching on and off.

Thermal cycling of cable and pipe reduces.

That extends cable life.

Sensitive process fluids benefit most.

It costs more than simple switching.

A failed circuit is invisible until it matters.

Nothing indicates that tracing has stopped.

Discovery happens when something freezes.

That is the most expensive possible moment.

Alarms on low temperature and circuit failure prevent it.

Ground fault monitoring catches cable damage.

On the pipe, away from the cable itself.

Too close and it reads the cable, not the pipe.

Manufacturers specify the position.

Under insulation, at a representative point.

Cold spots need their own consideration.

Record the location for later maintenance.

Detects cable damage before it becomes a fire risk.

Damage during lagging is the usual cause.

Moisture ingress at terminations is another.

It is a requirement in many jurisdictions.

Nuisance tripping usually indicates real damage.

Investigate rather than raising the setting.