1. Introduction
This manual provides essential instructions for the safe and effective use of your TANITA RD-901 InnerScan PRO Multi-Frequency Body Composition Monitor. The RD-901 utilizes advanced Bioelectric Impedance Analysis (BIA) technology to provide comprehensive body composition measurements. This device is FDA cleared and designed for consumer use to help monitor various health metrics.
2. Important Safety Information
WARNING:
- Individuals with an electronic medical implant, such as a pacemaker, should NOT use this scale. The Bioelectric Impedance Analysis (BIA) technology passes a low-level electrical signal through the body, which may interfere with the operation of such implants.
- Pregnant women should only use the weight function of this device. Other body composition functions are not intended for use during pregnancy.
- Always place the scale on a hard, flat surface for accurate measurements. Using it on carpet or uneven surfaces may lead to inaccurate readings.
- Ensure your feet are bare and clean when stepping on the scale to allow proper contact with the electrodes for BIA measurements.
3. Product Overview
The TANITA RD-901 InnerScan PRO is a sophisticated body composition monitor featuring a tempered glass platform with transparent electrodes. It is designed for ease of use and provides detailed insights into your body composition.
Key Features:
- FDA Cleared Multi-Frequency Bioelectric Impedance Analysis (BIA) technology.
- Measures 11 body composition metrics.
- Tempered glass platform with transparent electrodes.
- Guest mode and Athlete mode for tailored measurements.
- Automatic user recognition.
- Color-coded LCD display for quick result analysis.
- Built-in Bluetooth technology for connectivity with the Healthy Edge Mobile app.
Product Components:


4. Setup
4.1 Battery Installation
The TANITA RD-901 requires 4 AA batteries (included). Open the battery compartment on the underside of the scale and insert the batteries, ensuring correct polarity.
4.2 Placement
Place the body composition monitor on a hard, flat, and stable surface. Avoid carpets, rugs, or uneven flooring, as these can affect measurement accuracy.
4.3 Initial User Profile Setup
- Download the free Healthy Edge Mobile app from your device's app store (available for iPhone, Android, and Amazon Fire).
- Enable Bluetooth on your smartphone.
- Open the Healthy Edge Mobile app and follow the on-screen instructions to pair your device with the TANITA RD-901.
- Create your user profile within the app, entering details such as age, height, and gender. This information is crucial for accurate body composition calculations.
- The scale supports multiple user profiles, which can be managed through the app.
5. Operation
5.1 Taking a Measurement
- Ensure the scale is on a flat surface.
- Step onto the scale with bare feet, ensuring your feet are positioned correctly on the transparent electrodes. Stand still.
- The scale will automatically recognize your user profile (if previously set up) and begin the measurement process.
- Your measurements will be displayed on the color-coded LCD screen and automatically transmitted to the Healthy Edge Mobile app via Bluetooth.

5.2 Using the Healthy Edge Mobile App
The Healthy Edge Mobile app allows you to track, analyze, and graph your body composition results over time. It provides a detailed overview of all 11 measurements and helps you monitor progress towards your health goals.

5.3 Guest Mode and Athlete Mode
- Guest Mode: Allows a single measurement without storing data or affecting registered user profiles. Ideal for temporary users.
- Athlete Mode: Provides more accurate readings for individuals who engage in intense physical activity, typically 10 hours or more per week, and have a resting heart rate of 60 beats per minute or less. This mode adjusts the BIA algorithm for athletic body types.
6. Understanding Your Measurements
The TANITA RD-901 provides 11 body composition readings:
- Weight: Your total body mass.
- Body Fat Percentage: The proportion of fat to your total body weight.
- Muscle Mass: The total weight of muscle in your body.
- Muscle Quality Score: An indicator of the condition of your muscle tissue. A higher score suggests better muscle quality.
- Physique Rating: Assesses your body type based on body fat and muscle mass.
- Bone Mass: The estimated weight of bone mineral in your body.
- Visceral Fat: The fat surrounding your internal organs. High levels can indicate health risks.
- Basal Metabolic Rate (BMR): The minimum number of calories your body needs to function at rest.
- Metabolic Age: Compares your BMR to the average BMR for your age group.
- Total Body Water: The total amount of fluid in your body, expressed as a percentage of total body weight.
- Body Mass Index (BMI): A measure of body fat based on height and weight.
7. Maintenance
7.1 Cleaning
Wipe the scale surface with a soft, damp cloth. Do not use abrasive cleaners, harsh chemicals, or immerse the device in water. Ensure the surface is dry before storage or next use.
7.2 Battery Replacement
When the battery indicator appears on the display, replace all four AA batteries with new ones. Ensure correct polarity during installation.
7.3 Storage
Store the scale in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid placing heavy objects on the scale when not in use.
8. Troubleshooting
- Inaccurate Readings: Ensure the scale is on a hard, flat surface. Step on with bare, clean feet. Take measurements at a consistent time of day (e.g., morning before breakfast).
- No Display/Power: Check battery installation and replace batteries if necessary.
- Bluetooth Connectivity Issues: Ensure Bluetooth is enabled on your smartphone. Restart the app and the scale. Ensure the scale is within range of your phone.
- Error Messages: Refer to the Healthy Edge Mobile app's help section or the TANITA website for specific error code explanations.
If problems persist, contact TANITA customer support for assistance.
9. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 11.7 x 12.9 x 1.3 inches |
| Weight | 5.9 Pounds |
| Item Model Number | RD-901PRO |
| Batteries | 4 AA batteries required (included) |
| Display Type | LED |
| Weight Limit | 440 Pounds |
| Special Features | Basal Metabolic Rate, Body Fat, Body Mass Index, Bone Mass, Muscle Mass, Muscle Quality Score, Physique Rating, Visceral Fat, Total Body Water, Metabolic Age |
| Brand | TANITA |
| Manufacturer | Tanita |
10. Warranty and Support
For detailed warranty information, product registration, and customer support, please visit the official TANITA website or contact their customer service department. Keep your purchase receipt as proof of purchase for warranty claims.
Manufacturer: Tanita





