The Delta HLA -800 Series is designed to detect high water levels within sump pump (submersible pump) chambers.

The Delta HLA is an independent high water level alarm with a clear display on the front fascia via LED, which acts as a warning system in the event of:

  • power failure to the Delta HLA

  • a high water level situation in the chamber/sump

  • a high water level situation is recorded

  • a service due

Key features

  • Robust and reliable high water level alarm

  • Can be used with Delta V3, V4 and V6 800 Series when a control panel is not used

  • Detects changes in sump pump system

  • An internal battery ensures continuous protection in the event of mains power failure

  • Quick and simple installation

  • Includes a mini float switch and Delta Float Shroud

  • LED’s for visual status and warning

  • Mute and reset buttons

  • Three volt-free contacts for connection to external systems

  • Can be retrofitted

Technical specifications

  • NBS Specification R18 (Clause 310) Pumping Stations and Pressure Pipelines

  • BS 8102:2022 Type C Drained Protection

  • The Low Voltage Directive, EN61010:2010

  • The EMC Directive EN55014:2006, A1 and EN55014-2:2015

The Delta HLA offers a secondary line of protection in the event of mains power failure with a battery backup incorporated within the panel, ensuring continued protection.

The Delta HLA is simple to install and offers three volt-free contacts for connection to external systems. The Delta HLA operates via sump float switch. If the water level rises above the start point of the primary pump, the alarm float switch lifts until a point of contact is made internally. This signals to the panel that the water level is high and the panel goes into alarm. When the level drops, the switch falls which resets the alarm. The sump float switch is secured to the chamber’s integral float bracket by a cable gland and cable tie. For areas where the Delta HLA may not be seen or heard, we recommend using the Delta HLA Plus.

Associated products

  • Delta 800 Dual V3 Packaged Pumping Station

  • Delta 800 Dual V4 Packaged Pumping Station

  • Delta 800 Dual V6 Packaged Pumping Station

  • Delta 800 Single Foul V3 Packaged Pumping Station