Check the listing for details. rohde&schwarz NRP-Z21. Condition: Used. Listed at 2000.00 USD. The Rohde & Schwarz NRP-Z21 Power Sensor is a high-quality instrument designed for measuring RF and microwave power levels with a frequency range of 18 GHz. It features a Type N connector for easy and reliable connection to the system being tested. The sensor ensures accurate and precise measurements, making it a valuable tool for professionals in various industries who require reliable power metering capabilities. With the trusted brand of Rohde & Schwarz, users can expect superior performance and durability from this power sensor.