DESCO 19786 Resistance Meter Switch 10V/100V 9VDC

( Brand: Desco ), ( Manufacturer Part Number: 19786 ), ( Part Type: Switch Meter )

Review DESCO Surface Resistance Meter To Ohms Switch 9vdc

The **DESCO 19786 Resistance Meter** is a precision-engineered, dual-range analog instrument designed for accurate and reliable electrical resistance measurements in both professional and industrial environments. Built with a robust, durable construction, this meter features a high-quality analog dial with a clear, backlit display, ensuring optimal visibility even in low-light conditions. The device incorporates a **10 /100 switch**, allowing users to seamlessly toggle between two measurement ranges ideal for testing low-resistance components like relays, switches, and wiring connections, as well as higher-resistance elements such as resistors, coils, and sensors. Its **9V DC power source** provides stable operation, eliminating the need for external power supplies while maintaining consistent performance.

The **DESCO 19786** is equipped with a **zero-adjustment mechanism**, enabling precise calibration for accurate readings, even in environments where slight variations in test leads or connections might otherwise introduce error. The meter s **analog needle movement** delivers a smooth, intuitive response, making it easy to interpret resistance values with confidence. Its compact yet sturdy design ensures portability, allowing technicians and engineers to carry it effortlessly into fieldwork or workshop settings. Whether used for troubleshooting electrical circuits, verifying component integrity, or conducting routine maintenance checks, this resistance meter offers a dependable solution for professionals who demand precision and reliability in their measurements.

Built to withstand the demands of daily use, the **DESCO 19786** features a **durable metal housing** that protects internal components from impacts and environmental factors, while its **ergonomic grip** enhances comfort during extended use. The meter s **test leads** are securely integrated, ensuring stable connections and reducing the risk of loose or intermittent readings. With its **simple yet effective operation**, this resistance meter is perfect for both experienced technicians and those new to electrical testing, offering a balance of functionality, accuracy, and ease of use. Whether in a manufacturing plant, automotive workshop, or electronics repair facility, the **DESCO 19786** stands as a trusted companion for anyone requiring precise resistance measurements in their work.

The Desco 19786 is a basic analog resistance meter designed for measuring resistance, voltage (10V/100V), and providing a 9V DC output. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

1. **Affordability** This meter is a budget-friendly option, making it accessible for hobbyists, students, or small-scale projects where cost is a concern.

2. **Basic Functionality** It serves its core purpose well for simple resistance and voltage measurements, which can be useful for troubleshooting or educational purposes.

3. **Portability** Being a handheld analog meter, it is compact and easy to carry around for field testing or quick checks.

4. **No Power Supply Needed (for Measurement)** Unlike some digital multimeters, it does not require an external power source for basic resistance and voltage readings (though it does have an internal 9V DC output).

5. **Simple Design** The analog display is straightforward, making it easy to interpret readings without complex menus or backlighting requirements.

6. **Durability (for its Class)** As a basic analog meter, it is likely built to withstand general use, though it may not be as rugged as high-end professional tools.

7. **Good for Learning** Analog meters help users understand Ohm s Law and basic electrical principles in a tangible way, which can be beneficial for beginners.

1. **Limited Accuracy** Analog meters are generally less precise than digital multimeters, especially at higher resistance values. The 10V/100V range may not be very accurate for precise voltage measurements.

2. **No Auto-Ranging** Unlike modern digital multimeters, this meter requires manual selection of ranges (10V or 100V), which can be inconvenient and may lead to incorrect readings if the wrong range is chosen.

3. **No Additional Features** It lacks functions such as continuity testing, diode testing, capacitance measurement, frequency measurement, or data logging, which are common in digital multimeters.

4. **No Backlighting** Analog meters often require good lighting to read the needle accurately, which can be problematic in dim environments.

5. **Sensitivity to External Fields** Analog meters can be affected by electromagnetic interference (EMI), leading to inaccurate readings in noisy environments.

6. **Wear and Tear** The moving needle and internal components may degrade over time, potentially leading to drift or failure, whereas digital meters are generally more reliable for long-term use.

7. **No USB/Bluetooth Connectivity** There is no way to interface this meter with a computer or log readings digitally, limiting its usefulness in automated testing or data collection.

8. **Limited Voltage Range** The 100V maximum is quite low for many practical applications, and exceeding this range could damage the meter.

9. **No Overload Protection** Unlike many modern multimeters, this meter may not have built-in protection against reverse polarity or excessive voltage, risking damage if misused.

10. **No Calibration Capability** Analog meters often require periodic calibration, which may not be straightforward or possible without specialized tools.

The Desco 19786 resistance meter is a functional, low-cost tool for basic electrical measurements, particularly for resistance and limited voltage testing. It is well-suited for educational purposes, hobbyist projects, or simple troubleshooting where precision is not critical. However, for professional use, precise measurements, or applications requiring advanced features, a digital multimeter (DMM) would be a far superior choice. The trade-off between cost and functionality means this meter is best for users who prioritize simplicity and affordability over accuracy and versatility.

- **Buy it if:** You are a student, hobbyist, or someone who needs a very basic, low-cost meter for occasional resistance or voltage checks where accuracy is not critical. It can also serve as a teaching tool for understanding analog meter operation.

- **Avoid it if:** You require precise measurements, frequent use, or additional features like continuity testing, diode testing, or data logging. In such cases, investing in a digital multimeter (e.g., a Fluke, Multimeter, or even a mid-range digital model) would be far more practical and reliable.

- **Alternative Consideration:** If you like the idea of an analog meter but want better accuracy and features, look for a used analog multimeter with a wider range of functions or a digital meter with analog-style readability. For most practical purposes, a digital multimeter remains the better long-term investment.

Details:

For RTT/RGT Resistance. voltage Selection: 10V/100V Auto Switch. This is a surplus item. Range: 10 3 to 13 Ohms.

Supply voltage : 9VDC. Specifications: model #: 19786.

part #: 19786 prices

• $249.99-$650.00

specifications tesmetequ:

• brand: Desco
• mpn: 19786
• part type: Switch Meter

shipping tesmetequ:

• type: Calculated
• transit: 3-5 Days
• class: Standard, Expedited, One-day
• service: USPS First Class, USPS Priority Mail Padded Flat Rate Envelope, UPS Next Day Air
• cost: $0.00
• carrier: USPS, UPS

offer tesmetequ:

• sold: 0
• options: Ship-to-home
• best offers: True
• quantity: 1
• started: June 12, 2026
• availability: In Stock

returns tesmetequ:

• time: 30 Days
• paid by: Seller
• method: Money back
• policy: Returns Accepted

payments tesmetequ:

• wallet: Apple-pay
• other
• cash
• credit card: Mastercard

seller tesmetequ:

• rating: 99.9%
• # reviews: 46586
• city: Osseo, Minnesota

general tesmetequ:

• Test, Measurement Inspection > Test Meters Detectors > Other Test Meters Detectors
• condition: Used

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