Delta HLA Plus is an advanced smart high-water level alarm and monitoring system that provides real-time tracking, notifications, and data logging for pumping stations. It delivers audible and visual alerts plus remote monitoring via the Delta Pumps app, enabling proactive management of basement drainage systems. All models include lithium-ion rechargeable battery backup and are designed for use in Type C cavity drainage waterproofing systems.

Delta HLA Plus – Groundwater (DMS 531)

  • For groundwater, surface water, and clean water applications.

Delta HLA Plus – Foul Water & 800 Series (DMS 532)

For foul/grey water applications and Delta 800 Series packaged pump stations.

Delta HLA Plus Intelligent (Groundwater & Foul variants)

  • Enhanced version with Delta Level Float for intelligent pump activity monitoring and advanced analytics.

Key Specifications

  • Audible alarm: 85 dB

  • Real-time monitoring and notifications via Delta Pumps app (email/SMS alerts)

  • Lithium-ion rechargeable battery backup

  • LED status display and QR code activation

  • Three configurable volt-free contacts (high level, power failure, service due)

  • Data logging on internal SD card

  • Compatible with all Delta sump pumps and packaged stations

  • Retrofits easily to existing systems

Delta HLA Plus Intelligent

  • Includes Delta Level Float (DMS 536)

  • Monitors pump run times, activations, and flow trends

  • Advanced fault detection and service reminders

Range Comparison

Model

Code

Application

Intelligent Monitoring

App Notifications

Float Type

Volt-free Contacts

HLA Plus – Groundwater

DMS 531

Ground / Surface

No

Yes

Standard high level

3

HLA Plus – Foul / 800 Series

DMS 532

Foul / Grey + 800 Series

No

Yes

Pendant / counterweight

3

HLA Plus Intelligent

DMS 538 / 539

Ground or Foul

Yes

Yes

Delta Level Float

3

Standards & Compliance

All models comply with:

  • BS 8102:2022 (Type C drained protection)

  • Low Voltage Directive

  • EMC Directive

  • UKCA / CE marked

System Design Guidance

  • Selection: Use standard HLA Plus for basic smart monitoring. Choose Intelligent versions for detailed pump performance data and predictive insights.

  • Integration: Works with single or dual pump systems. App provides remote access from any device.

  • Best Practice: Ideal for habitable or high-value basements. Combine with dual pumps, battery backups, and standard alarms for full redundancy per BS 8102:2022.