Increased accuracy is achieved by microprocessor control and a digital readout. The meter automatically compensates for non-linearities and other sources for error in power measurements. Laser power readings are retained until the meter is "reset". This makes taking remote power measurements easy. Extension cables are available for situations when the distance between the meter and the head must be greater than 1.5 meters (5 feet). Power Probe Heads are inexpensive and easily switched. This permits alternating between two Probe Heads so that readings can be made using one head while the other head cools. The Probe Heads can be quickly cooled by water immersion. The Digital Laser Power Probe measures laser power with full accuracy from 20 watts to over 11 kilowatts using four Probe Heads with overlapping ranges. Each probe has better than a 10 to 1 power range. For example, the 220 watt head can accurately measure laser power from 220 watts down to 20 watts. The range, resolution and accuracy for each Probe Head are given in Table 1. The meter can also be used as a digital thermometer by substituting a thermocouple accessory for the Laser Power Probe Head. Temperature may be displayed in either C or F. This feature is very useful for checking the temperature of a cooling system or monitoring the temperature rise of an optical component. New absorption coatings have been developed which are more resistant to damage. See "Probe Head Selection" for more information.