Q: Is the 1919-R the best replacement model for the 1918-C (or 1918-R) power meter? 

A: The 1919-R is an advanced, feature-rich handheld power and energy meter. In most cases it would be a good replacement for either the 1918-C or the 1918-R. However, if you are using a computer routine to run the power meter, or if you need to utilize the high measurement and data acquisition rate, the best replacement options are the 1936-R or the 2936-R.

Q: Can I use a Newport Power Meter Application to communicate with 1919-R? 

A: No. The Newport Power Meter Application is only compatible with the 1830-R series and the 1936-R/2936-R power meters. Also note that the command lists are different between the 1919-R and the meters compatible with the Newport Power Meter Application.

Q: The 1919-R power meter has 'Power Density (W/cm2)' measurement available. Can I use the sensor with the active area for power density or irradiance measurements?

A: Our standard detectors can be used for power density measurements for relatively well defined beams. However, it is not recommended to use the full sensor active area in the measurements, because the responsivity changes at the edge of the photodiode. Instead, place a small aperture of a known size to make sure that all the beam falls well within the sensor, and enter the aperture size in the power meter. For the irradiance measurement of a diverging or Lambertian light source, we recommend 818-RAD (P/N 7N6080A) with its compatible power meter.