Probes and Senders

Here you will find probes and senders made by MGL Avionics or sourced for your convenience from other manufacturers

MGL Avionics fuel flow sender

  • Multi Range fuel flow sender.
    Using one of four supplied restrictor jets up to five flow ranges can be catered for.
    Fuel flow measurements from 3 liters/hour to as much as 500 liters/hour can be achieved. 
  • Compatible with 8mm and 12mm hoses and similar imperial sized hoses.
  • Compatible with a wide range of fuels including those with methanol and alcohol content.
  • Mechanical failure of the sender will not block the fuel flow.
  • The fuel flow sender is compatible with all of MGL Avionics range of products.
  • Successfully fitted to every possible engine type including large aero engines.

Fuel Flow Sender Manual (Filesize 1MB)
 

Flowscan fuel flow sender

  • U.S. made metal body fuel flow sender
  • Popular choice for larger aircraft
  • Uses standard AN fittings
  • Type 201A-6 stocked as standard, other flow ranges on request

Flowscan installation manual (Filesize 500KBytes)

Fuel level senders

This is a typical fuel level sender kit available from automotive supply shops. These kits come in many forms and types. You can use any resistive type sender with our instruments and you can also use capacitive probes if they have a voltage level output.
We do not supply these items due to weight considerations and freight costs. Please obtain these items from your local suppliers.
We recommend VDO level sender for our instruments.

Clamp type EGT probe

This probe is often used for after market fits and is available in two sizes to suit small and large diameter exhaust manifolds.

  • High grade stainless steel construction
  • Mineral fibre insulation for high temperature operation
  • Steel braided for toughness
  • Steel clamp with galvanised mechanism
  • Welded joint probe to clamp
  • 1m (3ft) length
  • K-type thermocouple

Probe diameter 5mm
Small clamp: probe length 16mm, diameter clamp 55-30mm
Large clamp: probe length 25mm, diameter clamp 65-40mm

Bolt type EGT probe

This probe is based on a metric 8x1 fine pitch thread such as used on some Rotax engines. It can be used on manifolds that do not have provision for this thread by drilling a 5mm hole for the probe and welding a suitable 8x1 fine pitch bolt to the manifold to retain the probe.

  • High grade stainless steel construction
  • Mineral fibre insulation for high temperature operation
  • Steel braided for toughness
  • 1m (3ft) length
  • K-type thermocouple

Consult engine manufacturer for correct positon. Typical positions are:

2-stroke engine: 100mm from exhaust flange
4-stroke engine: 75mm from exhaust flange

CHT probes

These "under the sparkplug" CHT probes are popular choices for CHT temperature monitoring.

  • One piece water cut pure copper ring and probe seat
  • 1 meter (3ft) cable length
  • K-type thermocouple
  • Thermocouple braised to flange of ring, no joint, no risk of detaching due to wear and tear
  • Very fast response time due to one piece copper construction

CHT probes are available in sizes 10, 12, 14, 18 mm (inside diameter ring).
The 10mm probe is popular for use as general temperature monitoring probe and can easily be bolted down (gearbox temperature etc).

Please note: These are pure copper probes and will quickly coat with a thin layer of oxide when exposed to air. If desired, this can be removed easily with Hyrochloric acid (pool acid) but this does not affect the probes performance.

CHT "Bayonette" probe

Machined brass body with freely rotating stainless steel shaft, 20 cm teflon cable, K-Type thermocouple. Thread standard 3/8"-24. Isolated probe configuration.

Coolant temperature probe

This probe fits the standard Rotax 582 thread.
This probe is refered to in MGL instruments as "MGL probe" or "MGL NTC sender". 

This probe is opimized for water based coolant temperature ranges.

Precision temperature probe

This probe is based on a LM335 silicon temperature sender and can be used with MGL instruments. Select probe type "Precision temperature probe" or "LM335 temperature sender".

This probe is electrically isolated which may be of advantage in some installations. The probe is suitable for water or oil based coolant temperature measurements.

GT-1 Gear Tooth Speed Sensor

This sender is currently no longer stocked by MGL Avionics due to cost.

It is made by Honeywell and is a popular choice as gear tooth pickup sensor for gryo planes (Rotor RPM pickup).
In South Africa this sender can be purchased at RS-Components.

Current measuring shunt

This generously dimensioned current measuring shunt is rated at 50A at 50mV and has convenient mounting arrangements for a simple and quick installation.

This shunt is suitable for use with our EFIS I/O Extender module as well as for the Infinity BAT-1 battery monitor.

Please note: It is not recommended to route currents to your engines starter motor through the shunt.
Shunts may change in shape and form factor but are generally similar to the image on the left.

LM335 ready made probe

This is the ambient temperature probe included as standard with any of our instruments that support ambient temperature measurements.

This probe is available as replacement but it is also a popular choice if you need to make your own coolant or oil temperature probes. In this case you use the brass body of an existing probe that fits your engines requirments, open this probe and remove everything that is inside (so you end up with a empty brass body withe the correct dimensions and thread). Then insert our LM335 probe and ensure that the probe body contacts the brass bosy (to ensure rapid transfer of temperatre). Then use a oil resistant epoxy to seal the probe inside the brass body.

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