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BF-450T Four stage timing water supply controller

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Functions overview

     BF-450T four-cycle timed water feeding controller for water tank can be widely used in various applications requiring timed water feeding.

The current content of the water tank can be measured in real time with AT35-7-U6 five-stage water level sensor. Users are allowed to sett up four time segments (i.e., cycles) as well as the full water level (0%, 30%, 50%, 80%, 100%) for each defined cycle.The control is able to control the water tank to reach the respective full water level in each working cycle. For example, according to the water consumption in different time segments every day, the water level can be set as 100% in the daytime and 50% in the midnight.

The control also features other functions, such as protection against dry heating in case of water-shortage, forced water feeding at low water level and manual water feeding.

Thanks to the wide range of rated power supply, the controller is able to ensure stable, reliable and durable operation by adapting to AC80V240V power supply.

Main Features

  • One-set AT35-7-U6 water level sensor input

  • Once-channel NO contact water feeding control output, two-channel ant-dry heating contact output

  • Display time and water level (in percentage)

  • Able to control the heating operation by setting up 4 cycles every day

  • Able to adjust the full water level for each water feeding cycle

  • Protect against dry heating in case of water-shortage

  • Memory protection after power failure

Specifications and Technical Data

Packing List of Product

1. Main unit

2. 1 x AT35-7 water level sensing wire kit

3. User instructions

4. M29 water level pinboard

5. Waterproof cover

6. Mounting bracket

Overall Dimensions (mm)

58 (L) × 78 (W) × 85 (T)

Installation and Dimensions (mm)

Window-mounted, opening size: 51 (L) ×71 (W)


Net weight: 0.442 Kg

Gross weight: 0. 597 Kg

Power Supply and Consumption Power

AC (80240)V, 2W

Operating Conditions

-10℃~ 50℃

Display Mode

LED digital display


Push-type membrane keys


AT35-7-U6 water level sensing wire input


1. One-channel relay NO/NC contact water feeding output, two-channel NO contact output (anti-dry heating control).

2. Current capacity of each channel contact: 6 A (resistive load) and 1 A (inductive load)

Able to control a 1000W electric heater or a 200W motor or water pump. AC contactor required for capacity expansion in case of larger load.

Timing Range


Measurement Range

0%, 30%, 50%, 80%, 100%

Setting Range

0%, 30%, 50%, 80%, 100%

Control Range

0%, 30%, 50%, 80%, 100%

Other Parameters

1. Temperature sensing wire can be extended by 100 m with ordinary wire for long-distance connection.

2. Memorize the set parameter for a long time after power failure

Power Supply and Input & Output Ports

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