Distributor of Automotive Gauges for Industrial Engines

Pressure, Temperature &
Fuel Level Senders

OIL PRESSURE SENDER

The oil pressure sender is a sealed round canister with a pipe thread connection on one end and a single electrical connection on the opposite end. The pipe thread size is most often 1/8 inch NPT. The electrical connection is most often a 10 x 32 threaded post with nut and washer fastener. The function of this sender is to provide a variable resistance as the measured pressure changes, which in turn, modulates the current flowing through the connecter gauge.  Inside the canister is a diaphragm which seals the oil from the electrical components. As the oil pressure increases it pushes the diaphragm outward from the oil chamber forcing a wiper arm to move across a variable resistance surface that is connected to the exterior threaded post electrical connection.
Gauge manufacturers are not standardized on the resistance of the senders so it is most important to select a gauge and sender combination from the same manufacturer to obtain the correct operation and accuracy.
All oil pressure senders look similar and there is no way to tell the pressure range and resistance from the outside. You must physically measure the pressure vs resistance of a given sender OR have knowledge of the manufacturers part number and sender specification. Our senders are matched to our gauges.

Part # SD0006   0 to 100 psi Oil Pressure sender for use with oil pressure gauge GP0801 This gauge requires a pressure sender with a 240 ohms @ 0 psi to 33 ohm @ 100 psi resistance range

Call: 860-779-0740 or Email For Quote!

Part # SD0003   0 to 80 psi Oil Pressure sender for use with oil pressure gauge GP9599 This gauge requires a pressure sender with a 240 ohms @ 0 psi to 33 ohm @ 80 psi resistance range

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COOLANT TEMPERATURE SWITCH

The water temperature switch is a sealed hexagonal pipe fitting with a pipe thread connection on one end and a single electrical connection on the opposite end. The common pipe thread size is most often ½ inch NPT. The electrical connection is most often a 10 x 32 threaded post with nut and washer fastener. The function of this switch is to trigger a shut down relay to stop the engine in the event of a coolant system over heat. When a temperature higher than the set point is sensed the internal bimetallic switch closes and connects the electrical connection to ground. The body of the switch is the ground when threaded into a metal engine block.

All temperature switches look similar and there is no way to tell the temperature set point if it is not stamped on the body of the switch OR have knowledge of the manufacturers part number and switch specification. Our switches are normally open and close to ground at 230 degrees F.

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FUEL TANK LEVEL SENDER

The fuel tank level sender is a open frame variable resistance element suitable for insertion in a fuel tank.  The resistance varies with the position of a float arm. The sender assembly is inserted through the top of the fuel tank. The attachment to the tank top is a round, flanged, gasket connection.  The flange has 2 electrical connections. The insulated one connects to the fuel level gauge. The non insulated connection connects to the battery negative (ground) on the engine.

The sender is adjustable for tank depths of 14 to 25 inches deep.  Resistance range is 240 ohms @ empty and 33 ohms @ full. This sender is best used with our GP0707 fuel level gauge. Directions for installation come with each sender.

Call: 860-779-0740 or Email For Quote!

COOLANT TEMPERATURE SENDER

The water temperature sender is a sealed hexagonal pipe fitting with a pipe thread connection on one end and a single electrical connection on the opposite end. The common pipe thread size is most often 1/8 inch NPT or 1/2 inch NPT.   The electrical connection is most often a 10 x 32 threaded post with nut and washer fastener. The function of this sender is to provide a variable resistance as the measured temperature changes, which in turn, modulates the current flowing through the connected gauge.  Inside the fitting (in the nose piece of the fitting) is a thermister. As the coolant temperature increases the resistance of the thermister changes.
This change is is sensed at the exterior threaded post electrical connection.
Gauge manufacturers are not standardized on the resistance of the senders so it is most important to select a gauge and sender combination from the same manufacturer to obtain the correct operation and accuracy.
All temperature senders look similar and there is no way to tell the temperature range and resistance from the outside. You must physically measure the temperature vs resistance of a given sender OR have knowledge of the manufacturers part number and sender specification. Our senders are matched to our gauges.

Part # TS1029  1/8 NPT Coolant Temperature sender 100 to 250 degrees F for use with temperature gauge GP0633. This gauge requires a temperature sender with a 460 ohms @ 100 degrees F to 29.5 ohms @ 250 degrees F resistance range.

Call: 860-779-0740 or Email For Quote!

Part # TS4042 1/2 NPT Coolant Temperature sender 100 to 250 degrees F for use with temperature gauge GP0633. This gauge requires a temperature sender with a 460 ohms @ 100 degrees F to 29.5 ohms @ 250 degrees F resistance range.

Call: 860-779-0740 or Email For Quote!

OIL PRESSURE SWITCH

The oil pressure switch is a sealed canister with a pipe thread connection on one end and a single electrical connection on the opposite end. The pipe thread size is most often 1/8 inch NPT.  The electrical connection is most often a screwed clamp terminal. The function of this switch is to trigger a shut down relay to stop the engine in the event of a low or loss of oil pressure.  Inside the canister is a diaphragm which seals the oil from the electrical components. As the oil pressure decreases a spring compresses the diaphragm and allows a switch closure that connects to the exterior electrical connection to the metal body of the switch housing. This connection allows current to flow from the shut down relay to ground and shuts down the engine. In our switches the spring that opposes the diaphragm is adjustable. Our nominal set point is 15 psi but can be varied from 8 to 20 psi by adjusting the spring tension.

All oil pressure switches look similar and there is no way to tell the set pressure from the outside unless it is stamped on the switch.  You must physically apply pressure to the switch and observe the switch action OR have knowledge of the manufacturers part number and switch specification.

Call: 860-779-0740 or Email For Quote!