Two built-in peristaltic dosing pumps are included with this controller.

These pumps have proportional control functionality, enabling the dosing frequency to be adjusted to the size of the body of water for effective maintenance of the pH and ORP (oxidation-reduction potential) set point.

A controller installed on a hot tub can be configured with a larger proportional band, such as 1.0 pH, to prevent larger swings in water chemistry.

Adjustable flow rate allows for further adaption on the controller, with a range from 0.5 to 3.5L/h.

Adjustable flow enables control over the amount of chemical that is dosed at one time, reducing the possibility of significant changes in ORP or pH.

Hanna Cloud is fully compatible with the hot tub controller providing cloud connectivity via a web-based application.

Measurements and data storage are easily accessed directly from a tablet, phone or PC, with the ability to store information from multiple devices in a single account.

Measurements, history, device settings, alarms and notifications are available through a dashboard, providing information about the dosing unit and any other connected instruments at a glance.

This up-to-date information allows you to keep track anywhere without the need to connect physically to the controller.

A comprehensive notification and alarm system is included with the hot tub controller.

This includes a multicoloured LED indicator system for dosing, meter status and service, providing live feedback.

A fully programmable alarm system allows the setting of both high and low levels for pH and ORP. If the water chemistry exceeds these limits, dosing stops, protecting against overdosing.

A temperature sensor is also included with the probe, which allows for temperature alarms. This alarm functionality is valuable for outdoor hot tubs, where the controller can provide notification that there may be a risk of water freezing in the pipe system.

pH and ORP are measured in tandem with the hot tub automatic controller.

Before chemicals are introduced to increase or reduce ORP, the pH value must first be at the defined set point.

A range of 650-750 mV at 7.2 pH indicates proper water sanitation. By first utilising the pH value, controllers in the BL-13X series can reduce the costs associated with the overuse of chemicals.

The hot tub control unit features full data logging, with a range of measurement reading intervals to choose from to suit personal preference or meet compliance regulations (HSG282).

Measurement reading intervals can be set to 30 seconds, 1 minute, 5 minutes, 15 minutes, 30 minutes or 1 hour, refreshing each day or following calibration.

ORP, pH and temperature are all logged, plus the last calibration data, event information and setup configuration.

The controllers for hot tubs and spas help businesses comply with HSG282.

Under the HSE’s 2017 legislation, both sanitation and pH levels should be continually logged and stored to help reduce the risk of legionella and other pathogens.