Standard Resistance Box SRB-19

Description

Technical Specifications

• Model: SRB-19

• Type: Standard Resistance Box / Reference Standard

• Accuracy:

  • ±0.5% for 20 µΩ

  • ±0.2% for all other values

• Resistance Range: 20 µΩ to 1 Ω

• Resistance Steps (6 values):

  • 20 µΩ, 100 µΩ, 1 mΩ, 10 mΩ, 100 mΩ, 1 Ω

• Resistor Material: High-stability Manganin wire coils

• Switch Type: Slide

• Power Rating: More than 1 Watt for all resistance values

• Maximum Current Capacity:

  • 20 µΩ — 250 A

  • 100 µΩ — 125 A

  • 1 mΩ — 50 A

  • 10 mΩ — 15 A

  • 100 mΩ — 3.5 A

  • 1 Ω — 1.25 A

• Decade Type: Resistance

• Calibration: Accuracy can be verified by NABL-accredited laboratories (external verification charges apply)

• Applications: Calibration labs, wire and cable industry, quality control testing, R&D laboratories, educational institutes

📋 Product Overview

The Standard Resistance Box SRB-19 is a compact, high-performance reference instrument designed specifically for ultra-low resistance calibration and high-current testing applications. Covering a range from 20 micro-ohms to 1 ohm, it is ideal for verifying measuring equipment where extreme precision at low resistance levels is essential.

The resistance coils are fabricated from manganin wire, ensuring minimal temperature drift and outstanding long-term stability. With dual-accuracy grading—±0.5% at 20 µΩ and ±0.2% across all other values—the SRB-19 delivers dependable performance suitable for demanding industrial and laboratory environments.

Each resistance value is rated at more than 1 watt, allowing safe operation at high currents without risk of overheating. The intuitive slide-switch decade operation enables easy selection of resistance values and smooth integration with Kelvin Double Bridges and Digital Micro-Ohm Meters for precise calibration and verification work.

The SRB-19 is widely used in the wire and cable manufacturing sector, electrical testing laboratories, QA departments, and educational institutions where accurate low-ohm measurements and high-current resistance standards are required.

⚡ Key Features

• Ultra-low resistance range: 20 µΩ – 1 Ω

• High accuracy: up to ±0.2% precision

• 6 fixed resistance values for focused calibration tasks

• Manganin wire resistance coils with excellent temperature stability

• High current handling capacity up to 250 A

• >1 W resistor power rating on all steps

• Slide-switch decade selection for easy operation

• Compatible with Kelvin Bridges and Digital Micro-Ohm Meters

• Suitable for industrial, laboratory & educational calibration systems