MAY21 Series Optical Multimeter

MAY20 Series Optical Power Meter


  • Simultaneous linnear (mW) and non-linear (dBm) display
  • Automatic Wavelength Recognition
  • Automatic frequency identification
  • Threshold setting
  • Support 1,000 data storage
  • Support USB connection with PC for data transfer
  • Support Backlight Level 4
  • Support user self-calibration
  • Support FC/SC/ST interfaces
  • Support USB Power Supply
Model MAY21A MAY21B
Measuring Range -70 to +10dBm -50 to +26dBm
Calibrated Wavelength 850/980/1300/1310/1490/1550/1625/1650nm
Detector Type InGaAs
Resolution Linear display: 0.1%, logarithmic display:0.01dBm
Linearity ±5%
Automatic Shutoff Time 10min
Continuous Working Time 12h
Data Storage 1,000
Connector Interchangeable FC, SC, ST
Tone Detection 270, 330, 1k, 2kHz
Power supply Rechargeable Lithium battery (2400mAh)
Backlight Yes
USB Interface Yes
Dimension 186*100*50mm
Net Weight 240g
Operating Temperature -10 to +50℃
Storage Temperature -40 to +70℃
Relative Humidity 0~95% (non-condensing)
Optical Light Source:
Wavelength 1310/1550±20nm
Emitter Type FP-LD
Output Power ≥-5dBm
Output Stability 30min: <±0.05dB
Connector FC/PC
Standard Accessory:
Item Name Quantity
1 Optical Multimeter with FC/PC adapters 1pc
2 SC Adapters 2pcs
3 2400mAh Lithium Battery 1pc
4 Data Line 1pc
5 Qualification Certificate 1pc
7 User Manual 1pc
Optional Accessory:
Item Name Quantity
1 ST Adapter for OPM port 1pc
2 ST Adapter for OLS port 1pc
3 Male FC to female LC adapter for LC connector 2pcs
4 Soft Bag 1pc
5 Power Plug 1pc
Ordering Information:
Model: MAY21X-X
Model X: OPM Range X: OLS
MAY21 A: -70~+10dBm S: 1310/1550nm
  B: -50~+26dBm M: 850/1300nm
    T: 1310/1490/1550nm
    T8: 850/1310/1550nm