BISON INSTRUMENTS 2350B Earth Resistivity Meter

( Brand: Bison Instruments ), ( Manufacturer Part Number: 2350B ), ( Type: Earth Resistivity Meter ), ( Country Of Origin: United States )

Review BISON INSTRUMENTS Model Earth Resistivity Meter Untested

The **Bison 2350B Earth Resistivity Meter** is a high-performance, field-deployable instrument designed for professionals in geotechnical engineering, environmental consulting, and utility locating who require precise and reliable measurements of soil resistivity, ground conductivity, and pipeline corrosion assessment. Engineered with advanced digital signal processing and robust construction, this meter delivers exceptional accuracy and repeatability in challenging field conditions, making it an indispensable tool for engineers, surveyors, and researchers. Its intuitive four-wire Wenner, Schlumberger, and other electrode array configurations allow for comprehensive subsurface resistivity profiling, enabling users to map variations in soil composition, detect buried utilities, assess groundwater contamination risks, and evaluate pipeline integrity with confidence. The 2350B features a large, backlit LCD display with clear, easy-to-read data, ensuring visibility even in low-light environments, while its durable, shock-resistant casing is built to withstand the rigors of fieldwork, including exposure to dust, moisture, and temperature fluctuations. With a wide measurement range spanning from 0.001 to 9999999 ohms, the device accommodates diverse soil types and depths, from highly conductive urban soils to resistive desert sands. Its built-in data logging and USB connectivity options streamline workflows by enabling seamless transfer of field data to computers for further analysis, while optional accessories like the **Bison 2350B-AC** for alternating current measurements expand its versatility for specialized applications such as pipeline coating evaluation and corrosion monitoring. Whether deployed for environmental site assessments, geotechnical investigations, or utility detection, the Bison 2350B sets a new standard for field resistivity testing, combining cutting-edge technology with unmatched durability and user-friendly operation to deliver actionable insights with precision.

The Bison 2350B Earth Resistivity Meter is a popular tool used for measuring soil resistivity, which is essential in grounding system design, electrical safety assessments, and geotechnical surveys. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Bison 2350B Earth Resistivity Meter**

1. **High Accuracy and Precision**

The Bison 2350B is designed with advanced electronics and a four-wire measurement system, which minimizes errors caused by contact resistance and cable impedance. This ensures reliable and repeatable readings, crucial for critical applications like grounding system design.

2. **User-Friendly Interface**

The device features a clear LCD display with intuitive navigation, making it accessible for both experienced professionals and beginners. The menu-driven interface simplifies data input, measurement selection, and result interpretation.

3. **Versatile Measurement Capabilities**

- **Wenner, Schlumberger, and four-point probe configurations** for soil resistivity testing.

- **Grounding resistance testing** (using the fall-of-potential method).

- **Polarization index (PI) and touch potential tests**, which are useful for assessing corrosion risks in buried structures.

This versatility makes it suitable for a wide range of applications, from electrical grounding to pipeline integrity testing.

4. **Durable and Rugged Construction**

The Bison 2350B is built to withstand harsh field conditions, with a robust casing that protects against dust, moisture, and minor drops. This durability ensures longevity, especially in outdoor or industrial environments.

5. **Data Logging and Export Functionality**

The meter can store measurement data internally and export it via USB to a computer for further analysis. This feature is valuable for creating reports, tracking trends over time, or sharing data with colleagues.

6. **Automatic Calibration and Self-Testing**

The device includes built-in calibration routines and self-diagnostic checks, reducing the need for manual calibration and minimizing user error. This saves time and improves efficiency in the field.

7. **Compatibility with Accessories**

- **Grounding rods and auxiliary electrodes** for various test configurations.

- **Remote control units** for hands-free operation, which is beneficial in high-voltage environments.

- **GPS logging** for georeferencing measurement points.

8. **Good Customer Support and Warranty**

Bison Instruments is known for providing solid customer support, including technical assistance and warranty coverage. This can be reassuring for users who require reliable after-sales service.

9. **Affordable Compared to High-End Alternatives**

While it is not the cheapest resistivity meter on the market, the Bison 2350B offers a strong balance between cost and performance. It is often more affordable than premium brands like Geoslicer or Terralyzer, making it a cost-effective choice for professionals and small businesses.

10. **Compact and Portable**

The meter is lightweight and portable, making it easy to carry to remote or hard-to-reach locations. This portability is ideal for fieldwork where mobility is essential.

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### **Cons of the Bison 2350B Earth Resistivity Meter**

1. **Limited Advanced Features**

- **Automatic electrode spacing adjustment** for certain configurations.

- **Built-in data analysis tools** (e.g., automatic resistivity profiling without manual calculations).

- **Bluetooth/Wi-Fi connectivity** for real-time data transfer to mobile devices.

Users may need to rely on external software for detailed analysis.

2. **Manual Operation for Some Tests**

While the interface is user-friendly, some advanced tests (e.g., complex grounding configurations) may require manual adjustments or calculations. This can be time-consuming for users unfamiliar with resistivity testing protocols.

3. **Dependence on Quality Electrodes and Cables**

The accuracy of the Bison 2350B is highly dependent on the quality of the electrodes and cables used. Poor-quality or corroded electrodes can introduce errors, and users must invest in high-quality accessories to maintain accuracy.

4. **Learning Curve for Beginners**

Although the interface is intuitive, resistivity testing involves understanding concepts like electrode spacing, current injection, and measurement principles. Beginners may require training or reference materials to use the device effectively.

5. **Limited Battery Life**

The meter typically operates on standard batteries (e.g., AA or rechargeable Li-ion), and while the battery life is sufficient for most fieldwork, users should carry spares, especially for long or remote projects.

6. **No Built-in Temperature Compensation**

Soil resistivity can vary with temperature, and while some meters adjust for this automatically, the Bison 2350B does not. Users may need to manually account for temperature variations or use external sensors.

7. **Software Dependency for Advanced Analysis**

For tasks like creating resistivity profiles or interpreting complex data, users may need to rely on third-party software (e.g., Res2dinv, WinResist). This adds an extra step and potential compatibility issues.

8. **No Touchscreen or Touchpad**

The navigation is done via buttons, which can be less efficient than touchscreen controls for quick adjustments or data entry.

9. **Limited Customization for Specialized Tests**

While the meter covers most common applications, specialized tests (e.g., very deep resistivity profiling or high-frequency measurements) may require additional equipment or configurations not supported by the Bison 2350B.

10. **Occasional Firmware Updates**

Like many electronic devices, the Bison 2350B may require firmware updates to access new features or bug fixes. Users must ensure they have access to support for these updates, which could occasionally disrupt fieldwork.

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### **Conclusion**

The Bison 2350B Earth Resistivity Meter is a well-rounded and reliable tool for professionals who require accurate, versatile, and portable resistivity measurements. Its strengths lie in its **accuracy, ease of use, durability, and affordability**, making it an excellent choice for grounding system design, electrical safety assessments, and geotechnical surveys. The device is particularly suitable for users who prioritize **practicality and cost-effectiveness** without needing cutting-edge features.

However, it is not without limitations. Users who require **advanced automation, real-time data transfer, or highly specialized testing** may find it lacking compared to higher-end alternatives. Additionally, the need for **manual adjustments, quality accessories, and external software for analysis** could be seen as minor drawbacks for some users.

For most **mid-level professionals, contractors, or small businesses** in electrical, civil, or environmental fields, the Bison 2350B strikes a strong balance between performance and value. It is a **practical investment** for those who need a dependable tool without the complexity or cost of premium systems.

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### **Recommendation**

- You need a **reliable, accurate, and user-friendly** resistivity meter for general purposes like grounding testing, soil resistivity surveys, or pipeline integrity assessments.

- You prioritize **durability and portability** for fieldwork in various environments.

- You want a **cost-effective solution** that doesn t require advanced features or automation.

- You are willing to use **external software** for detailed data analysis and are comfortable with manual adjustments where necessary.

- You require **automated resistivity profiling, advanced data analysis, or real-time connectivity** (e.g., Bluetooth/Wi-Fi).

- Your work involves **highly specialized or deep resistivity testing** that the Bison 2350B does not fully support.

- You need **touchscreen controls or more intuitive navigation** for efficiency.

- Budget is not a constraint, and you want the **latest features and future-proofing** for evolving applications.

For the vast majority of users seeking a **balanced, high-quality, and affordable resistivity meter**, the Bison 2350B is an **excellent choice**. Pair it with high-quality electrodes and cables, and invest in training if needed to maximize its potential.

Details:

Vintage test equipment collectors. Rare vintage Bison Instruments 2350B Earth Resistivity Meter. Untested and sold as-is since I do not have the proper equipment to fully check operation. Restoration or parts.

The unit shows normal cosmetic wear from age and use. This unit is being sold untested. I do not have the equipment, cables, or field setup needed to fully evaluate its operation, calibration, accuracy. Please review all photos carefully to judge condition for yourself.

This is a specialized geophysical testing instrument used for earth/soil resistivity applications and hard-to-find piece of industrial field equipment. Because of that, it is being sold as-is, with no guarantees regarding full functionality. No cables, probes, manuals, case, or accessories are included unless specifically pictured. Offered for sale is a vintage Bison Instruments Earth Resistivity Meter, model 2350B.

Specialized industrial resale. This is a good candidate for: geophysical equipment buyers. Includes only the unit shown in photos. Clean display piece for its age with visible wear from normal use.

Hard-to-find geophysical instrument. Includes only what is shown in the photos. The front panel presents well, and all markings are clearly visible.

part #: 2350b price

• $449.49

specifications tesmetequ:

• brand: Bison Instruments
• mpn: 2350b
• type: Earth Resistivity Meter
• country of origin: United States

offer tesmetequ:

• sold: 0
• started: March 7, 2026
• quantity: 1
• options: Ship-to-home
• availability: In Stock

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