AlpHa Measurement Solutions |
Chlorophyll a in Research & Education

Chlorophyll a in Research & Education

Understanding chlorophyll a concentrations is fundamental to advancing research & education in aquatic ecosystems and water quality. In university research labs, chlorophyll a sensors enable students and researchers to gain insights into algal dynamics, environmental change, and ecosystem health.

AlpHa’s XC-CHLA sensor utilizes patent pending optical technology with the following unique features:

  • Industry leading minimum detection limit at 0.01 ppb
  • Automatic temperature compensation
  • Analog (0 – 3 V) or digital (RS-485 MODBUS RTU) output formats
  • Options for custom OEM sonde multiparameter and stand-alone configurations

Chlorophyll-a sensors in Research & Education

XC-CHLA Sensor Capabilities

  • Minimum Detection Limit: < 0.01 ppb
  • Linearity: R2 > 0.999
  • Chlorophyll a Range: 0 to 100 ppb (µg / L)
  • Chlorophyll a Response Time:
    • Sonde: T100 ~3 seconds
    • Stand-alone: ~2 seconds
  • Temperature Range: 0 to 50°C
  • Max Pressure: 375 m 
  • LED Center Wavelength: 430 nm
  • Emission Wavelength: 670 / 110 nm
  • Input Power:
    • Sonde: 5 – 36 VDC
    • Stand-alone: 6 – 36 VDC
  • Power Consumption:
    • Sonde: 450 mW
    • Stand-alone: 500 mW
    • Custom Options Available
  • Warranty: 12 Months

Configuration Options

  • Form Factor
    • Stand-alone
    • Sonde / Cartridge
    • Custom Options Available
  • Housing Material Options
    • Titanium
    • Custom Options Available
  • Thermistor Options
    • Integrated Temperature Compensation
  • Integrated Insertions
    • Custom Options Available

Communication and Connection Options

  • Analog
    • 0 – 3 V with UART-MODBUS
    • Custom Options Available
  • Digital
    • RS-485 MODBUS RTU
    • Custom Options Available 
  • Connectors
    • Integrated Connectors (detachable or cableless)
      • Custom Options Available 
    • Connectors with Cables (including temperature)
      • Any commercially available connectors and custom options