MPS-1 Manifold Pressure Sensor
The MPS-1 is a solid-state sensor that measures engine manifold
pressure. With a working pressure range of 6 to 73 inches of
Mercury, this sensor can be used with both turbo and non-turbo
The MPS-1 is available in two variants:
- Absolute (MPS-1A)
- This is the 'standard' sensor that, until now, was named the
MPS-1. It measures absolute manifold pressure using a single
port (as pictured on the right) and has the advantage that the
CSC-1 will display the "real" manifold pressure at any altitude.
Disadvantages of using this sensor are that the CSC's %power
display will progressively underead as height is gained and that
the estimated fuel flow display option is not available unless
you are using a fuel injected engine.
- Differential (MPS-1D)
- This two-port sensor measures the difference in pressure
between the engine's manifold and the ambient pressure. When
using this sensor, the CSC-1's manifold pressure display is only
an estimate at sea-level and it will progressively overead as
height is gained. The advantage of this sensor is that the
%power display becomes independent of altitude and, effectively,
indicates throttle position. Furthermore, the CSC-1 can display
a reasonable estimate of fuel flow when this sensor is being
Both variants of the MPS-1 have a simple 3 wire electrical
interface for direct connection to the CSC-1. The 100cm long flying leads are
Teflon insulated for use in high temperature (200 °C)
environments. Power supply requirements are minimal, the unit
draws just 10mA from the +12V supply.
For durability, the sensor is potted into a plastic case which
is easily mounted using the supplied M4 screws.
Total weight is 60g.
Copyright 2003-2008 Smart Avionics Ltd.