INSIZE 1108-300
INSIZE 1108-300 Electronic Caliper User Manual
Model: 1108-300 | Brand: INSIZE
1. Introduction
The INSIZE 1108-300 Electronic Caliper is a precision measuring instrument designed for accurate dimensional measurements in various applications. This digital caliper offers a measurement range of 0-12 inches (0-300mm) with a high resolution of 0.0005 inches (0.01mm), making it suitable for both professional and hobbyist use. Constructed from durable stainless steel, it features a clear digital display and user-friendly buttons for easy operation.
2. Safety Information
To ensure safe and effective use of your INSIZE Electronic Caliper, please observe the following safety guidelines:
- Always handle the caliper with care to prevent dropping or impact, which can affect its accuracy.
- Keep the measuring surfaces clean and free from dust, oil, or debris.
- Do not apply excessive force when taking measurements, as this can damage the jaws or compromise accuracy.
- Store the caliper in its protective case when not in use to prevent damage and maintain calibration.
- Avoid exposing the caliper to extreme temperatures or high humidity.
3. Components Overview
Familiarize yourself with the main parts of your electronic caliper:
- External Measuring Jaws: Used for measuring outside dimensions.
- Internal Measuring Jaws: Used for measuring inside dimensions.
- Step Jaws: Used for measuring step dimensions.
- Depth Rod: Used for measuring depth.
- Main Scale: The fixed beam with the measurement scale.
- Sliding Jaw: The movable part of the caliper.
- Digital Display: Shows the measurement reading.
- ON/OFF Button: Powers the unit on or off.
- ZERO Button: Sets the display to zero at any position.
- INCH/MM Button: Switches between imperial (inches) and metric (millimeters) units.
- Data Output Port: Allows connection for data transfer (cable sold separately).

Figure 3.1: Overview of the INSIZE 1108-300 Electronic Caliper, showing its main body, digital display, and measuring jaws.
4. Setup
4.1 Battery Installation
The INSIZE 1108-300 Caliper uses a CR2032 button cell battery. To install or replace the battery:
- Locate the battery compartment cover on the digital display unit.
- Slide the cover open or remove it according to the markings.
- Insert a new CR2032 battery with the positive (+) side facing up.
- Close the battery compartment cover securely.
4.2 Initial Cleaning
Before first use, gently wipe all measuring surfaces with a clean, dry, lint-free cloth to remove any protective oils or dust.
5. Operating Instructions
5.1 Power On/Off
The caliper can be powered on by pressing the ON/OFF button or by simply moving the digital unit along the main scale. It features an automatic power-off function to conserve battery life when not in use.
5.2 Zero Setting
To ensure accurate measurements, it is crucial to zero the caliper before use:
- Close the measuring jaws completely, ensuring they are clean and free of debris.
- Press the ZERO button. The display should now read 0.0000 or 0.00.
- The caliper can be zeroed at any point along its range to measure relative distances.
5.3 Unit Conversion
Press the INCH/MM button to switch between imperial (inches) and metric (millimeters) measurement units. The selected unit will be indicated on the digital display.
5.4 Taking Measurements
Ensure the caliper is clean and zeroed before taking any measurements.
- External Measurement: Place the object between the external measuring jaws. Gently close the jaws until they make firm contact with the object. Read the value on the digital display.
- Internal Measurement: Insert the internal measuring jaws into the opening of the object. Open the jaws until they make firm contact with the inner surfaces. Read the value.
- Depth Measurement: Place the end of the main scale on the top surface of the object. Extend the depth rod into the hole or recess until it touches the bottom. Read the value.
- Step Measurement: Place the step jaws against the two surfaces of the step to be measured. Read the value.

Figure 5.1: Demonstrates the use of the INSIZE 1108-300 Electronic Caliper for taking an internal measurement of a cylindrical object.
6. Maintenance
Proper maintenance will extend the life and accuracy of your caliper:
- Cleaning: After each use, wipe the entire caliper, especially the measuring surfaces, with a clean, dry, soft cloth. Do not use solvents or harsh chemicals.
- Storage: Store the caliper in its original protective case in a dry, clean environment, away from direct sunlight and extreme temperatures.
- Battery: If the caliper will not be used for an extended period, remove the battery to prevent leakage.
- Calibration: For critical applications, periodic calibration by a qualified technician is recommended to ensure continued accuracy.
7. Troubleshooting
Here are some common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low or dead battery. | Replace the CR2032 battery. |
| Inaccurate readings. | Dirt or debris on measuring surfaces; Caliper not zeroed correctly; Damage to caliper. | Clean measuring surfaces thoroughly; Re-zero the caliper; Inspect for physical damage. |
| Display shows erratic numbers. | Electromagnetic interference; Low battery. | Move away from strong electrical fields; Replace battery. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 1108-300 |
| Measurement Range | 0-12 inches / 0-300 mm |
| Resolution | 0.0005 inches / 0.01 mm |
| Measurement Accuracy | +/- 0.0012 inches |
| Power Source | CR2032 Battery |
| Material | Stainless Steel |
| Buttons | ON/OFF, ZERO, INCH/MM |
| Automatic Power Off | Yes (activated by movement) |
| Data Output | Yes (port available) |
| Product Dimensions | 16.89 x 5.16 x 1.3 inches |
| Item Weight | 15.87 ounces |
9. Warranty Information
This INSIZE product is covered by a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region. Please retain your proof of purchase for warranty claims. For detailed warranty information, refer to the documentation included with your product or visit the official INSIZE website.
10. Customer Support
If you encounter any issues or have questions regarding your INSIZE 1108-300 Electronic Caliper that are not addressed in this manual, please contact INSIZE customer support or your authorized dealer for assistance. When contacting support, please have your product model number (1108-300) and purchase information readily available.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.

