ULPOWER UL35Oi, Installation Manual

Page: 52 / 60

Installation Manual UL POWER UL350i UL350i F UL350i S UL 350i HPS 350i SA
MI 350A01 Revision No: 7 Date: 2014-09-15 Page: 52 of 60
Instruments
Recommended Sensors
In order to operate the engine within the specified limits of the operating handbook, operator
should at least monitor following parameters:

RPM

Oil Pressure

Oil Temperature

Fuel Pressure

CHT

EGT (optionally)

Manifold Pressure (optionally)

Battery Voltage

Amp (optionally)
UL Power offers different sensors. You will find more information on the parts and accessories list.
RPM
The ECU unit has a pulsed output which gives two (2) pulses per revolution. Any instrument that can
use a 12V pulse can be connected to the ECU for RPM reading.
Oil Pressure & Oil Temperature
Oil pressure and temperature are both important figures to monitor and
should be kept within operating limits at all times. Therefore an oil
pressure sensor and oil temperature sensor should be installed on the
engine and (analogue or digital) gauges installed on the aircraft's
dashboard. Make sure sensors and gauges are compatible and properly
calibrated.
Recommended specifications for oil pressure sensor:

range: 0-10 bar (0-150 psi)

thread : 1/8"NPT
Recommended specifications for oil temperature sensor:

range: up to at least 130°C (266°F)

thread: 5/8"-18 UNF or M10 ; M10x1 ; M12x1.5 ; 1/8 NPT if adaptor plug (option) is used
The oil and fuel pressure sensors shown are passive analogue sensors of the
resistive type. Active 12V solid state sensors are more expensive but are much
less sensitive to vibration and therefore more reliable. However only certain
instruments will accept active pressure sensors.