MAC125 Moisture Analyzer

For
HIGH TEMPERATURE
ABSOLUTE HUMIDITY MEASUREMENT

---

• The MAC125 Moisture Analyzer is a major advancement in the measurement of absolute humidity.
  
  
• The measurement process is solid state. No chemicals, compressed air, wet bulb techniques, optics or mirrors are used. The probe is protected from particles by a 10 micron ceramic filter element, that is cleanable and replacable.
  
  
• The MAC125 is the latest generation of Absolute Humidity Transmitters from MAC Instruments. The MAC125 and it's predesessors are providing accurate, reliable, high temperature humidity measurement in many difficult applications throughout the world since 1990.
  
  

---

• Measure Absolute Humidity to Virtually Any Temperature
  
  
• Measure moisture in a flame
  
  
• 2 Voltage Options
  • 120V / 60Hz
  • 230V / 50Hz
    
    
• Jumper Selectable Scales
  • % Moisture by Volume
  • Humidity ratio (lb water vapor / lb dry air) (g water vapor / g dry air)
    
    
• In-Situ Measurement
  • Mounts directly to stacks, ducts, flues, ovens, furnaces, calciners, kilns, dryers, fuel cells, etc.
    
    
• NEMA 4X / IP53 Water Proof Design
  • Suitable for outdoor installation
    
    
• Standard Signal Outputs (Jumper Selectable)
  • 0-20mA ( 0 to 5V with 250 Ohm load )
  • 4-20mA ( 1 to 5V with 250 Ohm load)
    
    
• Severe Duty Industrial Construction
  • Stainless steel barrel
  • Cast aluminum enclosure
    
    
• Automatic Altitude / Pressure Compensation

---

---

Available Ranges

Model	% Moisture By Volume	Humidity Ratio
MAC125-100-120V	0 to 100%	0 to 10
MAC125-100-230V
MAC125-60-120V	0 to 60%	0 to 1
MAC125-60-230V
MAC125-30-120V	0 to 30%	0 to 0.25
MAC125-30-230V
MAC125-20-120V	0 to 20%	0 to 0.15
MAC125-20-230V
MAC125-10-120V	0 to 10%	Not Available
MAC125-10-230V

---

Temperature Range

• 40° F / 4° C to 1200° F / 650° C - Above 1200° F requires special mounting tube

Pressure Range

• 1 Atmosphere ± 5 PSI / 35 kP

Accuracy

• ± 1% of %Mbv Full Scale

Repeatability

• ± 1 % of %Mbv Full Scale

Linearity

• ± 1 % of %Mbv Full Scale

Response Time

• 120 Seconds or less to reach 90% of final value

Analog Output

• 4 - 20mA, 0 - 20mA (User Selectable)

Power Requirements

• 120V / 60 Hz or 230V / 50 Hz, 3A max (Specify required voltage when ordering)

---

Options

• Digital Display (Built into MAC125)
• Case Heater for Operation at Low Ambient Temperature
• Case Cool Soleniod valve (requires 10 PSI / 69 kPa Clean, Dry Air) for Operation at High Ambient Temperature
• Filter Blow Back Soleniod valve (requires 10 PSI / 69 kPa Clean, Dry Air) filter can be blown out by closing an external contact or by setting a time for the valve to open for 2 seconds daily (jumper selectable)
• Various Standard and Custom Mounting Tubes and Adapters

---

View the MAC125 data sheet in pdf form. (requires Adobe Acrobat reader) download Acrobat reader

---