Fire retardant casing
  Larger LCD
  Selectable overdose protection system
  External disable feature
  Selectable control override
  Matching pin connection
  4-20 mA analog output

Traditionally, process monitoring and control has required considerable investment in system design, equipment, maintenance and training. With the introduction of the BL Series Mini-Controllers, Hanna provides a solution for industries that require reliable, efficient and affordable process monitoring and control.

The new BL Series Mini-Controllers are easy to use, durable and provide precise monitoring and control of pH, ORP, TDS, EC, and Resistivity.

Each Mini-Controller is 8 x 5 cm (3 x 2") in size and weighs less than 9 oz. The compact size and simplicity of design allows for easy installation and integration into almost any existing system. Each model is a single set point controller designed to control the operation of a pump, valve or mechanical device for dosing, filling and emptying tanks and rerouting flow.

The control action of each Mini-Controller can be disabled, set to automatic or manually operated directly from the front panel.

A selectable "Overtime" overdosing system can deactivate a valve, pump, or other connected device if activation continues for more than the set time, which is adjustable from 5 up to 30 minutes.

pH Mini-Controllers

Monitoring and controlling pH in water conditioning and industrial applications is essential for water quality and maintaining infrastructure (piping and equipment). In the case of industrial effluent, neutralization of acidic waste is vital for environmental safety and public health. In industrial applications such as boiler feed water conditioning, a higher pH of 8.5 is necessary to prevent scaling and corrosion of critical components. Maintaining a pH of 7.2 is fundamental for proper and efficient sanitization in swimming pools and spas. The effectiveness of sanitizers such as chlorine is dependent on a controlled pH value.

ORP Mini-Controllers

ORP (Oxidation Reduction Potential) is the most dependable and consistent indicator of the sanitizing effectiveness of your pool, spa or treatment water. As oxidizers such as chlorine, peroxide and O-zone are added to water for the purpose of sanitization, the ORP value increases, providing a clear indication of the cleansing power of the water. Typically, an ORP value of 650 to 700 mV at a pH of 7.2 indicates that your water is properly treated and all harmful bacteria are killed in less than 1 second.

ORP is also essential in chemical processing where reducing agents are used and a negative ORP value is an indicator of proper neutralization.

Conductivity Mini-Controllers

In water, an increase in conductivity indicates an increase in water hardness and a decrease in purity. Conductivity monitoring and control is essential in reducing water hardness and maintaining water quality. For instance, water with a conductivity value in the range of 0-140 μS is considered "very soft" where as water with a range of 640-840 μS is considered "hard" water. An increase in conductivity indicates an increase in the amount of damaging dissolved solids (salts) present in water.

Conductivity monitoring and control is essential in industrial applications such as feed water control, blow down activation in cooling towers and water management where high conductivity will cause scaling and corrosion of piping and damage to critical components.

TDS Mini-Controllers

TDS measurement is an important indicator of water quality. An increase in the TDS reading indicates an increase in the amount of dissolved solids (salts) present in the water. TDS monitoring and control is imperative in industrial applications such as feed water control, blow down activation in cooling towers and water management where high TDS will cause scaling and corrosion of piping and damage to critical components.

TDS measurement is also an important indicator of the effectiveness of water conditioning since an increase in TDS indicates an increase in water hardness and a decrease in purity. This will affect the quality of drinking water, feed water and rinse water. TDS monitoring and control is crucial in reducing water hardness and maintaining water quality and usability.

Resistivity Mini-Controller

Resistivity, measured in MΩ (Ohm's), is the optimal way to measure the quality of water produced by high purity systems such as R.O systems and water conditioning equipment. As filter systems become less effective, the resistivity value will decrease indicating a need for maintenance and/or replacement of filters and critical components. Properly functioning RO and water conditioning systems will consistently produce water with resistivity readings in the range of 16 to 18MΩ.

Datasheet

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