Voltage Regulator - 12Vdc Output - Wema UK
Voltage Regulator - 12v Output - Wema UK
Voltage Regulator - 12v Output - Wema UK

WUVR1-I536-O12

Voltage Regulator - 12v Output

Regular price£20.00
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Rated Input Voltage: 8V / 12V / 24V
Input Voltage Range: 7 - 36 Volts dc
Output Voltage: 12 Vdc
Output Current: 3A
Output Power: 36W
Waterproof Rating: IP68
Dimensions: 64 * 57 * 22mm
Weight: 110g
Working Temperature: -40ºC to +80ºC
Efficiency: 90%
Voltage Regulation: <1%
Load Regulation: <2%
Ripple & Noise: 150mVp-p
No Load Loss: 28mA
Input Cable: Red / Black
Output Cable: Yellow / Black
Compliance: ROHS / CE
Short Circuit, Low Voltage, Overload & Over Temperature Protection

INPUT: RED WIRE - BATTERY +
INPUT: BLACK WIRE - BATTERY -

OUTPUT: YELLOW WIRE - 12v +
OUTPUT: BLACK WIRE - 12V -

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Description

Our new Voltage Regulator - 12v Output - does one job, simply and effectively — takes an input of 7-36 volts dc and outputs a regulated 12 volt dc current.

Useful on both 12 and 24 volt systems — on 24 volt systems it reduces the voltage down to 12 volts, and on 12 volt systems it ensures a constant 12 volt current. 

One voltage regulator will replace all of the dropping resistors normally wired in-line on a 24 volt dashboard. 

The voltage regulator provides a constant, regulated current and ensures that the gauge read-out does not alter with voltage fluctuations.

Voltage regulators are especially important when using a 0-10v or 0-5v sender.

One voltage regulator works for multiple gauges, able to provide 12 volts to the whole dashboard (up to 3A) and replacing the need for individual dropping resistors on a 24 volt system.

As an example; a standard Wema
Wema 52mm analogue gauges will draw a maximum current of 130mA, so each 3A voltage regulator can supply power for up to 20 standard gauges.

The built in heat-sink ensures the heavy duty die-cast aluminium body stays cool through simple air convection.

All the electronics are sealed providing IP68 (submersible up to 1.5m deep for at least 30 mins) protection from the elements.

The  voltage regulator contains NCC & NICHICON internal capacitor to ensure high efficiency and a long service life - up to 100,000 hours.

 

Voltage Regulator - 12v Output - Specifications

 Rated Input Voltage

8V / 12V / 24V

Input Voltage Range

7 - 36 Volts dc

Output Voltage

12 Vdc

Output Current

3A

Output Power

36W

Waterproof Rating

IP68

Dimensions

64 * 57 * 22mm

Weight

110g

Working Temperature

-40ºC to +80ºC

Protection

Short Circuit, Low Voltage,

Overload & Over Temperature

Efficiency

90%

Voltage Regulation

<1%

Load Regulation

<2%

Ripple & Noise

150mVp-p

No Load Loss

28mA

Input Cable

Red / Black

Output Cable

Yellow / Black

Compliance

ROHS / CE

To supply a replacement fuel or water sender we just need to know:

OR

  • What is the Wema product code?

If your sender has information stamped on the head then we can identify your sender from the product code:

 Identifying a Wema sender

[Please note: the code 001300 refers to the S3 head and the code 001306 / 001305 refers to the S5 sender head]

 

Do you have an S3 or S5 sender?

The S3 has a screw in head with a 1.25" BSP thread like this:

[NOTE: A 1.25" BSP (British Standard Pipe) thread will actually measure larger than 1.25 inches when measured with a tape measure.  This is because a BSP measurement refers to the internal bore of a pipe (for accurate flow rate) and not the outside of the thread.] 

Wema S3 sender head

The S5 has a bolt down head with 5 holes like this:


Wema S5 sender head

 

[NOTE: The 5-hole drill pattern in the top of an S5 sender head is a standard SAE-5-hole pattern.] 

 

If you have a sender that is not an S3 or S5 then please click here

 

What resistance is your current sender and gauge?

The sender and gauge must have the same resistance values or the gauge will read incorrectly.

You can either test the gauge or the sender to find this out.

 

To test the sender:

  • Disconnect the two wires on top of the sender.

  • Remove the sender from the tank.

  • Connect the wires on the sender to a multimeter. 

  • Set the multimeter to resistance [Ω ohms]

    How to test a sender - Wema

  • Move the float to the top of the sender and take a reading on the multimeter:

    • At the top of the sender (full) the resistance should be:

      • European specification - 190 ohms

      • American specification - 30 ohms

  • Move the float to the bottom of the sender and take a second reading:

    • At the bottom of the sender (empty) the resistance should be:

      • European specification - 0 ohms

      • American specification - 240 ohms 

To test the gauge:

 If you have access to the wires on the back of the gauge;

  • Power the gauge off

  • Disconnect the black wire (sender) 

  • Power the gauge on

  • If it's an American gauge the needle will show EMPTY

    • Touch the black wire to earth, the needle will go to FULL

  • If it's a European gauge the needle will show FULL

    • Touch the black wire to earth, the needle will go to EMPTY

If you don't have access to the back of the gauge;

  • Disconnect the two wires in the loom that attach to the sender.

    • If it's an American gauge the needle will show EMPTY

    • If it's a European gauge the needle will show FULL

Length?

To measure an S3 or S3H sender (with screw in head) measure from the top of the thread to the bottom of the stem.

How to measure Wema S3 sender

To measure an S5 sender (with bolt down head) measure from the underside of the flange to the bottom of the stem

 How to measure Wema S5 sender

  

How many wires?

If your S5 or S3 sender has 2 wires then it is a standard resistance sender.

If your S5 or S3 sender has 3 or 4 wires then it is either a 0-5v, 0-10v sender or it has a high/low level alarm.

If you have a 3 or 4 wire sender then please contact us before ordering.

If your sender has a high or low level alarm we will need to know if the switch is normally off (when the tank is empty), turning on when the tank is full or normally on, turning off when the tank is full.  We will also need to know how far from the top or bottom of the sender you would like the alarm switch to be.

 

Tank Contents?

For fuel or water then you can fit the maximum length of sender for your tank.

For a black water holding tank we recommend leaving at least 50mm from the bottom of the tank regardless of the material the tank is made from.

If you tank does not contain fuel, fresh water, grey water or black water then please contact us for more specific information.  For very thick liquids like oil or grease we may need to know the viscosity.

 

Wema Sender Identification Chart 
    (click here for larger view)

Wema Sender Identification Chart 

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