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Electronic Tank Level Controller Switch

Need to maintain a certain water level in your holding tank? Then you can't go wrong with this inexpensive, reliable solution for tank level control. This electronic controller saves money on repairs as there are no moving parts to break down, and it will continue to work where regular float switches fail, helping to prevent costly damage. This controller works on any size pump up to 14 amps, giving you greater flexibility. This tank level controller switch may just be the item you are seeking. The tank level controller is designed to control the level of water in a tank between maximum and minimum levels. This type of control is useful in maintaining water levels in aquariums, landscaping ponds, waterfalls, water sculptures, and many other applications. This electronic tank level controller works with most brands of pumps like: DuraMAC, Little Giant and Zoeller.

tank fill controller switchIndoor Model
This indoor tank level controller switch features:
  • Easy installation without the need to change your plumbing
  • No tools required - makes for easy installation
  • Plugs into standard electrical outlet
  • No mechanical parts to wear out
  • 120VAC, 14 amp (max current)
  • 12 ft sensor cable length
  • For indoor use only

Indoor Electronic Tank Fill Control Switch = $84.39
for pumps up to 14 amps

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Outdoor Electronic Tank Level Control Switch

This Outdoor Electronic Tank Level Controller has been designed to control a pump or solenoid valve in outdoor conditions. This control switch can operate in rain or snow as well as in geographical locations that have large ambient temperature swings.

outdoor tank fill controller switch
This outdoor tank level controller switch features:
  • OUTDOOR or indoor installations
  • Plugs into standard three-prong electrical outlet with GFI
  • Easy to install - no tools required
  • No mechanical parts to wear out
  • 2 sensors strategically placed control high and low fill point
  • We have not found a pump brand this switch will not work with
  • When this switch is off a solid red light means both sensors are detecting water. Flashing red light indicates only one sensor is detecting water
  • When this switch is on a solid green light means it is working correctly as neither sensor is detecting water. A flashing green light indicates only one sensor (typically the lower sensor) is detecting water and when water reaches the higher sensor the switch will turn off the pump
  • Control module rated for temperatures from -40° F to 120° F
  • 5' long power cord
  • 12' long sensor cables
  • 120VAC, 14 amp (max current)

OUTDOOR Electronic Tank Fill Control Switch = $129.95
for pumps up to 14 amps

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How To Position The Sensors

tank level controller, how it works

How these Tank Level Controller Works
The position of the sensors determine when the control module turns the pump on, and when it turns it off.
The sequence below outlines the operation of this switch as follows:
  1. When both sensors are detecting water, the pump is off
  2. When the water drops between the two sensors the pump stays off
  3. When neither sensor is detecting water, the pump is turned on
  4. The pump stays on while the water is between the sensors
  5. The pump is turned off when the water reaches the top sensor

Things To Keep In Mind

  • The "piggyback plug" attached to the mechanical float switch cannot be used with the tank level controller. It must be disconnected and remain disconnected.
  • If your sump pump has an internal float switch wiring, i.e. doesn't have a "piggyback plug," then you must secure the float up as if the pit were full so that its internal switch is always closed and the pump enabled.
  • The sensors shouldn't touch anything else in the pit, like the wall, each other, the discharge pipe, pump, etc. If they do, the tank level controller might be confused and think it is time to turn the pump on, or fail to turn it off.
  • The tank level controller works with any 120VAC pump up to 3/4HP and a maximum of 14 amps.

Special Sensor Installation Instructions

When the HC4100 Tank Level Controller is going to be used in a tank or pond that has high mineral or iron content, the sensors have to be mounted in a specific manner so they won't be affected by the water's content and reliably detect water levels for many years of trouble free operation.

Step 1
To install the sensors properly for this type of water environment, you will need a few additional items:
  • 1/2" PVC pipe (available at local hardware store). The length of pipe should be suitable for your application.
    Length of pipe can be determined by how deep your tank is and how far apart you want your sensors to be placed.
    Read how the position of the sensors determine water level.

  • 1 Each 1/2" PVC cross = $1.28 +

  • 1 Each #20 Stainless steel hose clamp = $1.12 + - secures 1/2" cross to 1/2" PVC pipe

  • Choose only 1 Each of the following depending on the size for your discharge pipe size

  • 1 Each #32 Stainless steel hose clamp = $1.26 + - secures 1/2" cross to 1-1/2" discharge pipe

  • 1 Each #40 Stainless steel hose clamp = $1.54 + - secures 1/2" cross to 2" discharge pipe
Step 2
In this step you will need to pass the #20 stainless steel clamp through one side of the 1/2" PVC cross and pass the #40 stainless steel clamp through the other side of the 1/2" PVC cross. If your discharge pipe is 1-1/2" PVC or ABS then you will need to use a #32 stainless steel hose clamp instead of the #40 stainless hose clamp. This step is in preparation for the following steps. Go on to Step 3
Step 3
Strap the two sensors to the 1/2" PVC pipe using the tie-wraps included with the controller. Position one sensor to set the level where the pump is to turn on. Position the other sensor where the pump is to turn off. It makes no difference which sensor is placed in the high or low position. They can be placed as far apart, or as close together, as your application requires. Please note: The tip of the lower sensor needs to be above the minimum pump down depth of the pump. If placed too low, it may cause the pump to not pump the water below the sensor's tip, which can keep the pump running indefinitely.

Step 4
Position the 1/2" PVC pipe between the PVC cross with the #20 stainless steel hose clamp. Tighten the hose clamp until the 1/2" PVC pipe is held snuggly against the PVC cross.

Step 5
Position the PVC cross to the desired height of the sensors in the pit. Wrap the #40 stainless hose clamp (or #32 if 1-1/2" discharge pipe is used) around the discharge pipe. Tighten the stainless steel clamp until the PVC cross is held firmly in place against the discharge pipe.

Related Items & Accessories:

Frequently Asked Questions

Q. "How far apart can the Tank Level Controller 'sensors' be placed vertically apart from each other?"
A. The location of the sensors is only limited by the length cables (12ft), but other than that, the sensors have no other restrictions as to how close or how far apart they are placed vertically or horizontally. When water is above both the sensors then the pump will be off. When water is below both sensors the pump will be on.

Q. "Do you offer a pump switch that operates opposite of this tank level controller?"
A. We offer the Hi-Lo SumpController which works opposite of the Tank Level Controller. The purpose of the SumpController is to make sure your tank does not overfill. This item is designed to be off when both sensors are not contacting water, and as soon as both sensors do contact water, the pump turns on and drains the pit until the water level drops below the bottom sensor.

Q. "I installed this Outdoor Electronic Tank Fill Switch and my pump won't turn off but keeps running. Is my switch defective?"
A. Your switch is most likely not defective. The water in the pit needs to have a good ground for the sensors to work properly. Normally the pump provides enough of a ground for the sensors to operate correctly, however, occasionally it won't. When this happens a ground wire will need to be added to the pit. The ground wire is simply a length of copper wire with a short section of insulation removed from both ends. One end is placed into the pit so the bare tip of the wire is located below the tip of the lowest sensor. The ground wire can be zip tied in place to the drain pipe. Having the ground wire locacted below the lowest sensor ensures the water will be grounded by the time it reaches the sensor. The top side of the ground wire needs to be secured to something with a good earth ground. It can be secured to a copper water pipe or metal electrical conduit by using a ground clamp available from your local hardware store. Or the ground wire can be secured to the center screw of an electrical outlet box using as suitable crimp-on eyelet connector, also available at your local hardware store.

ground clamp
ground clamp
crimp on eyelet connection
eyelet connector

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