Grand Rapids Technologies is proud of its line of aircraft-quality probes and accessories. Details like the use of stranded thermocouple lead wires, stainless steel thermistor housings, and teflon insulated wire are indicative of the attention to quality in our probes and of all of our products.

EGT Probes - EGT probes include 4' of matching extension wire and connector accessories They are constructed with an Inconol 600 protection tube, compacted mineral insulation, and a water-proof transition joint with 2' long stranded leads with stainless steel overbraid. Type-K calibration. Aircraft quality--not the low cost wire-in-a-tube type. (6' total length.)

Part No. EGT-HC-01 Features a traditional hose clamp type attachment. Suitable for most all engines.

Part No. EGT-HCS-01 Smaller hose clamp for 1-2" diameter pipes. Ideal for Rotax 912/914.

Part No. EGT-CF-01 Features a 1/8-27 NPT compression fitting. Popular with the newer Rotax exhaust manifolds

EGT Extension Wire - PVC insulated dual conductor stranded type-K thermocouple extension wire.

CHT Probes - CHT probes include 4' of matching extension wire and connector accessories. Double fibrous glass braid insulation is used with these spark plug gasket-type probes.

Part No CHT-10 - 10 mm diameter for Hirth engines and for use on offset CHT measurements for Rotax 912/914.

Part No CHT-14 - 14 mm diameter for Rotax, AMW, Zenoah, and most others.

Part No CHT-18 - 18 mm diameter for Lycoming and Continental

CHT Bayonet Style Probe - Spring loaded push and turn type probe for Lycoming and Continental engines with 1-1 3/4 inch deep wells for measuring cylinder head temperature. These probes are superior to spark plug gasket type probes because they are not subject to the wear or inconvenience of spark plug gasket types. Bayonet adapter required

Part No CHT-BAY-01 Bayonet-style CHT probe

Part No CHT- ADPT-01 threaded bayonet adapter

CHT Extension Wire - PVC insulated dual conductor stranded type-J thermocouple extension wire.

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Use of EGT & CHT Extension Wire Matching EGT and CHT extension wire should be used when it is necessary to extend lead lengths for these probes. The matching wire allows the EIS to compensate correctly for ambient temperature fluctuations, and thus assures maximum instrument accuracy.

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Fluid Temperature Probes. Constructed of stainless steel or solid bar-stock machined brass, these probes feature teflon insulated lead wire and a precision thermistor accurate from 80-300 deg F.

Part No FT-1827-02 1/8-27 pipe threads type. Suitable for all Rotax, AMW, and many other engines. Used for both fluid and oil temperature with the Rotax 912 and 914.

Part No. FT-LC-01 A 5/8" threaded probe complete with gasket for sensing oil temperature as recommended for Lycoming and Continental engines.

Outside Air Temperature Probe -- Accurate over a range of 15-160 degrees F for air temperature measurements. For all models except Advanced-W. (Part No. OAT-01)

Power Converter Module -- Provides 12 Vdc, 0.4 Amps from lighting coil equipped engines. Allows the EIS to be powered directly from the lighting coil without the need for a 12 V battery. (Part No. PCM-02)

Gear Tooth/Pulse Adapter-- A general purpose gear tooth to voltage adapter. Allows use of the Auxiliary input for Rotor RPM sensing for rotorcraft or for any second tachometer input to the EIS. Also suitable for use with Flo-Scan fuel flow sensors. Custom scaling available at no charge. (Allow 3 weeks delivery.) (Part No. ADPT-GT-01)

Manifold Pressure Sensors - Used with the auxiliary input of the advanced EIS to display manifold pressure in inches of mercury.

Part MAP-01 Range of 0-31 inches of Hg for normally aspirated engines.

Part MAP-02 Range of 0-51 inches of Hg for turbo-charged engines.

Fuel/Oil/Coolant Pressure Senders - Using the auxiliary input, these senders allow the EIS to display the following pressures.

Part LPS-02 Suitable for fuel and coolant pressures over a range of 0-28 psi

Part HPS-01 Suitable for oil and coolant pressure over a range of 0-99 psi.

UMA Airspeed Indicator  - High quality made in the USA, Dual-Diaphragm type. This type allows accurate airspeed measurements below 20 mph.

Part UMA - 80 UMA 3 1/8in. 80mph Airspeed Indicator

Part UMA - 100 UMA 3 1/8in. 100mph Airspeed Indicator

Part UMA - 120 UMA 3 1/8in. 1200mph Airspeed Indicator

Part UMA -  Call and ask about special options available.

Available in 2 1/4" also.

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Planning Your Installation

The EIS uses 2 D-sub connectors for its electrical connections. These connectors are highly reliable, are easily inserted and removed, and include captive retaining screws. Two options are available for installation of these connectors.

Option 1. Install the D-sub connectors provided with the EIS to your aircraft wiring. These connectors included contacts that are crimped to your wiring, and then inserted into the connector housing. (Solder-type connectors available in place of crimp-type upon request.) Wires must be stranded 20-24 gauge. This option allows the lightest and neatest installation since no splicing of wires or terminal strips is required.

Option 2. Use one or both pre-wired cables. This option simplifies installation by eliminating the need to install the connector to the end of the cables. When the connector A cable is used, your aircraft wiring is connected to this cable by splicing or with the use of a terminal strip (not included). This option is slightly heavier than option 1, but is faster since the connectors are already installed.

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Pre-wired Cables

Connector A Cable 3 feet long, includes a female D-sub connector at one end, and color coded leads at the other end. 22-gauge conductors, PVC insulation. (Part No CAB-A-01)

EGT/CHT Cable Factory installed male-D-sub connector for the EGT/CHT and oil pressure connections. Price includes connector and oil pressure lead. EGT and CHT extension wire not included in price. Specify the length and number of EGT and CHT leads. Unused EGT and CHT inputs will be provided with a 1 foot lead so that this input may be shorted (as recommended) or extended in the future. (Part No CAB-B-01)

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Grand Rapids Technologies, Inc. 889 76th SW Byron Center, MI 49315 (616) 583-8000 Fax (616) 583-8001