Waterproof Dissolved Oxygen Meters

PHDG-70 and PHDG-71

• Measures Dissolved Oxygen in % and mg/L
  
• Automatic Temperature Compensation
  
• Includes Probe with Removable Membrane and 10 Ft Cable
  
• Available with Optional Alarms
  
• 4-20 mA Recorded Output

The PHDG-70 and PHDG-71 waterproof dissolved oxygen meters have been designed for use in damp environments and are waterproofed to IP54 standard. Perfect for monitoring oxygen levels in processes, fish farms or for BOD measurements, the PHDG-70 and 71 come complete with a membrane type oxygen sensor that is temperature compensated over the range of 0 to 40°C. The units will measure in percent or mg/L. The sensor features screw on pretensioned membranes to ensure repeatability of results. To record gas uptake, the 4 to 20 mA output may be used to drive a recorder. The PHDG-71 has a built in alarm system consisting of two totally independent alarm points each having its own relay and front panel indicator. To provide a fail safe backup in the event of a power failure, the relays are energized below setpoint.