Philips 21221 Pencil Probe | 1.9 MHz Medical Sonos

The Philips cw/pw pencil is a Philips ultrasound transducer listed in our catalog. The verified data on this page — frequency band, compatible console, and category — supports probe identification and procurement decisions.

• Designed and catalogued as a cw/pw pencil for Philips ultrasound systems.
• Listed for use on Philips Sonos 1000, Sonos 1500, Sonos 3500, Sonos 4500, Sonos 5500, EnVis consoles.
• Manufacturer part reference on file: 21221.
• Catalog-listed frequency band: 1.9 MHz.
• Listed under the Philips probe / transducer product line.

Catalog compatibility covers the following Philips consoles: Sonos 1000, Sonos 1500, Sonos 3500, Sonos 4500, Sonos 5500, EnVis. Confirm the host-system revision matches the part reference before placing the order.

Ultrasound probes integrate the piezoelectric element array, the acoustic lens, the connector, and (in many designs) a built-in identification chip that the console reads on connect. Cleaning, disinfection, and inspection between uses follow the manufacturer's reprocessing guide and are part of routine clinical-engineering workflow; mechanical damage to the lens, cable strain relief, or connector pins is the most common cause of probe replacement in the field.

• 1× Philips 21221 Pencil Probe | 1.9 MHz Medical Sonos
• Product identification / part reference label

• Verify the part number and model fitment against your unit's documentation prior to purchase.
• Product images and descriptions are for reference; the appearance of the actual item may vary by production batch or revision.
• If you are unsure about compatibility, contact our support team with your system model and serial number.
• Validate probe recognition and image quality on the host console before clinical use.
• Confirm connector type, frequency range, and intended clinical application before ordering.
• Mechanical damage to the lens, cable strain relief, or connector pins is the most common cause of probe replacement in the field.

SKU/Link Reference: Philips21221A