Topargee Surface Mount (H2F – SM) – Water Tank Gauge, RV, Motorhome, Boat, Caravan, 4×4

Topargee Surface Mount (H2F – SM) – Water Tank Gauge, RV, Motorhome, Boat, Caravan, 4×4


Breakthrough Design for the RV and Marine Industries
*Takes all the guess work out of your water supply.
*Displays number of litres left in your water tank.
*Counts down litre by litre from a preset amount.
*Stop wasting fuel by filling up unnecessarily.
*Know how much is used for washing, showers etc.
*Know your daily water usage in litres
*Essential for bush/ free camping.
*Fitted in water line, nothing is fitted to water tanks.
*One unit can be used for any number or size tanks.
*Displays in gallons or litres.
*It can be used in conjunction with your current system to accurately know your capacity and usage.
N.B. Does not include hose connectors, see Connecting Sender Unit below.
Our new RV senders and electronics are compatible with all commonly available RV and marine water pumps and will even work with gravity fed systems.

Surface mount.
Very easy installation.
2 x AA battery power (supplied in Australia only)
Suitable for Marine & RV applications.
Quick fit Velcro mounting.
1.4 Mt. sender lead.
Sender leads can not be cut and joined, ext. leads must be used.
1.4 Mt. and 3 Mt. sender extension leads available.

If extra length of lead is required, please purchase the “3 Pin Sender Extension Lead”, as we have found other leads extensions cause inaccuracy in the meter readings.

3 Pin Sender Extension Lead available in either 1.4m ($7.95) or 3m ($14.95).

**If required, multiple leads can be joined to make up the length**

We now have two RV/Marine models, the H2F SM (surface mount) suited more to the DIY aftermarket and our new H2F FM (flush mount) designed to provide a superior appearance to more closely match the other displays in new RVs. 

Included in Box:

  • Digital Display.
  • Mounting Velcro.
  • 2x AA Batteries. (Australia only)
  • Instructions.
  • RV Inline Sender.
Installing Batteries
Slide the cover off the battery compartment and put in the two AA alkaline batteries supplied.  Slide cover back into place being careful not to catch any wires.  
Connecting Sender Unit
Sender unit comes pre-wired with an approximately 1.4m cable.  Extra 1.4m extension leads are available for the three pin plugs, up to 6 leads may be joined to make 9.8m in total length.  Leadscannotbe cut and joined, doing so will void warranty, No Exceptions.
The thread specifications of the sender unit are 1/2″ BSP male.   Make sure the sender is fitted with the water flow in the direction of the arrow.
You will need to purchase two 1/2″ BSP female connectors to the size hose you have, usually 1/2″ or 3/4″ and two clamps. John Guest quick connections also have fittings to suit their hose and the 1/2″ BSP sender unit.
See next section for sender unit mounting positions.

Programming Monitoring Capacity

Press the Display button to turn the display on, press the “PROG” button, “ProG” will blink on the LCD display. Press and release “RESET” button to choose the value of the right digit.  Once the value has been chosen, press “PROG” button to save the value, it will then go to the next digit.  Repeat the above procedure to program the values for the five digits from right to left.  The maximum monitoring capacity is 99,999 litres.  The first time the meter is used fill the water tank and then use normally until empty.  Then note how many usable litres the tank holds and reset the meter accordingly.
*If there is no input for one minute during the programming procedure, the programming procedure will be terminated and goes back to the original status
The TOPARGEEH2Flow will automatically turn on and display the litres remaining when there is water flowing through the sensor e.g. a tap is turned on.  It will automatically turn off 10 seconds after there is no water flowing.  To manually check remaining litres, press and release “Display” button and remaining litres will be displayed for 10 seconds.

End of Capacity Alert
H2Flow will give an audible alert and the digits blink on the LCD display when the remaining capacity reaches zero or minus.

When the water tank has been refilled.

Press the Display button to turn the display on, press the “RESET” button for six seconds, the “rESEt” on the LCD display blinks twice, the unit will then be reset to the originally programmed value.
TIP!  You may find it easier to use the side of your fingernail, coin or pencil etc. to hold the button in for the six seconds.

Low Battery Power Alert
When the battery power is low, there will be an audible alert and the empty battery symbol on the right hand corner of the LCD display blinks.  The alert status will be cancelled when the batteries are replaced by new batteries.  The data of the last status will be memorised and restored.
Note: Due to continuous product improvement, specifications are subject to change without notice.

1 year manufacturer warranty

To change from litres to gallons or gallons to litres:

  1. Disconnect the power (or batteries)
  2. Press and hold the “PROG” button while reconnecting the power.
  3. Release the button when you hear the long beep.  The display will be switched (from litres to gal, or gal to litres)
  4. Wait until the screen turns off and the unit will memorize the setting.​​​

Additional information

Weight 0.25 kg
Dimensions 12 × 10 × 7 cm

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