Baseline Finger Goniometer, 3.5 Inch, Standard, 140 Degree

The Baseline Standard Finger Goniometer is a 3.5-inch instrument designed for accurate range-of-motion measurement of the metacarpophalangeal (MCP) and interphalangeal (IP) joints of the hand. The 140-degree head features two opposing scales marked in 5-degree increments for clear, precise readings, and one arm includes a linear scale in both inches and centimeters for additional measurement versatility. For practitioners requiring a larger protractor head and a full 180-degree scale, the Baseline Deluxe model is also available.

Key Features

• 3.5-inch arm length — sized for finger and small joint ROM measurement
• 140-degree head with two opposing scales — marked in 5-degree increments for precise readings
• Linear scale on arm in inches and centimeters
• Measures MCP and interphalangeal joint range of motion
• Standard model — Deluxe model available with larger head and full 180-degree scale

Specifications

• Brand: Baseline
• SKU: 10047B
• UPC: 714905014890
• Arm length: 3.5 inches
• Head range: 140 degrees
• Scale increments: 5 degrees
• Linear scale: Inches and centimeters
• Model: Standard
• Country of Origin: China

Ideal For

This finger goniometer is an excellent choice for occupational therapists, hand therapists, and physical therapists who perform routine finger and small joint ROM assessments as part of hand rehabilitation, post-surgical follow-up, or functional capacity evaluations. It is well-suited for hand therapy clinics that need a reliable, easy-to-read instrument for documenting MCP and IP joint motion in 5-degree increments for clinical records and insurance documentation. The compact 3.5-inch size makes it particularly effective for measuring individual finger joints where a standard full-size goniometer would be too large to position accurately. Any hand therapy or rehabilitation clinic that requires a durable, accurate finger goniometer for daily clinical use will find the Baseline standard model a dependable and practical choice.

Frequently Asked Questions

What joints can this finger goniometer measure?
This goniometer is designed to measure the range of motion of the metacarpophalangeal (MCP) joints — the knuckle joints at the base of each finger — and the interphalangeal (IP) joints, including the proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints. It can also be used for thumb IP and MCP joint measurements. For wrist or larger joint measurements, a standard full-size goniometer is more appropriate.

What is the difference between the Standard and Deluxe models?
The Standard model features a 140-degree head with two opposing 5-degree increment scales. The Deluxe model features a larger protractor head with a full 180-degree scale, which provides more accurate readings for joints with greater range of motion or when a larger reference surface improves measurement precision. Both models include a linear scale on the arm. Your choice will depend on the joints you measure most frequently and your preference for head size and scale range.

How do I position the goniometer correctly for finger ROM measurement?
Align the goniometer's axis of rotation with the joint being measured. Place one arm along the proximal segment of the finger and the other arm along the distal segment. Read the angle at the head of the goniometer with the joint in the desired position (flexion, extension, etc.). Your occupational or physical therapist can demonstrate correct placement technique for each joint and measurement direction.

How do I clean the goniometer?
Wipe down with a damp cloth and mild disinfectant between patient uses, following your facility's infection control protocols. Avoid submerging the instrument or using harsh solvents that may damage the plastic. Store flat or in a protective case to prevent warping of the arms over time.