Zeta Addressable Heat Detector – MKII Series for Reliable Thermal Fire Detection

The Zeta Addressable Heat Detector from the MKII series is a highly reliable fire detection solution designed for precise temperature monitoring in commercial, industrial, and high-risk environments. Available in fixed temperature and rate-of-rise models, this detector series is engineered to respond to rapid temperature increases or to alarm once a predefined threshold is reached. Each unit is compliant with EN54 Part 5 and approved by LPCB, ensuring trusted performance and regulatory compliance.

The MKII-AHR detects both rapid increases in temperature and a fixed threshold of 57°C, while the MKII-AHF and MKII-AHF/CS90 models provide fixed heat detection at 57°C and 90°C respectively. Ideal for areas where smoke detectors may not be suitable, such as kitchens, workshops, or dusty environments, the Zeta heat detectors offer stable performance and straightforward integration into addressable fire alarm systems.

Product Features

Multiple Detection Models Available

Choose from fixed heat (57°C or 90°C) and rate-of-rise detection models depending on the risk level and application needs.

Addressable System Integration

Designed for use with addressable fire alarm control panels, enabling precise location reporting and system-wide diagnostics.

LPCB Certified

All models in the MKII heat detector range are LPCB-approved, ensuring adherence to global fire safety standards.

EN54 Part 5 Compliant

Built to meet the requirements of EN54 Part 5, guaranteeing reliable operation under defined fire testing conditions.

Wide Area Coverage

Each unit offers a coverage area of 50m², suitable for medium to large rooms and enclosed spaces.

Fast Response Time

Detectors initialize within 10 seconds of power-up, ensuring rapid readiness for active monitoring.

Compact and Lightweight Design

Each unit measures 100 x 49 mm and weighs only 133g with base, supporting discreet installation on ceilings.

Product Specifications

• Model Variants:
  • MKII-AHF – Fixed Heat Only A2S (57°C trigger)
  • MKII-AHF/CS90 – Fixed Heat Only CS (90°C trigger)
  • MKII-AHR – Rate of Rise & Fixed Heat A1R (57°C trigger)
• Part Numbers:
  • MKII-AHF – 80-214
  • MKII-AHF/B – 80-214/B
  • MKII-AHF/CS90 – 80-218
  • MKII-AHF/CS90/B – 80-218/B
  • MKII-AHR – 80-212
  • MKII-AHR/B – 80-212/B
• Design Standard: EN54 Part 5
• Approval: LPCB
• Operating Voltage: 17 to 28V DC
• Quiescent Current: 500μA
• Alarm Current (at 24VDC): 5mA
• Operating Temperature Range:
  • MKII-AHF / MKII-AHR: -10°C to +50°C
  • MKII-AHF/CS90: -10°C to +80°C
• Minimum Continuous Temperature: 0°C
• Maximum Humidity: 95% RH (non-condensing)
• Alarm Condition:
  • Fixed Heat at 57°C or 90°C
  • Rate of Rise or Fixed Heat (57°C) for MKII-AHR
• Coverage Area: 50m²
• IP Rating: IP43
• Startup Time: 10 seconds
• Size (with base): 100 x 49 mm
• Weight (with base): 133g
• Remote Output: 5mA at 24VDC