Socket & See SOK DSO Polarity Socket Tester
Quickly Identify DNO Cross Polarity and Wiring Faults
The Socket & See SOK DSO Polarity Socket Tester has been specifically designed for electricity distribution companies to identify DNO cross polarity on the incoming customer supply. Featuring a unique ground reference system, the tester requires the user to press the test button before testing begins, helping to eliminate user error and ensuring clear interpretation of the results.
In addition to testing the total supply system polarity, the Socket & See SOK DSO quickly indicates a reversed Live/Neutral on a PME system, highlighting issues that are not easily detected using other methods. The tester also functions as a plug tester, providing visual and audible indication of up to 19 different wiring conditions, making it a versatile addition to any professional electrician‘s toolkit.
Order the Socket & See SOK DSO today for fast, reliable polarity testing and clear wiring indication.

Socket & See SOK DSO Key Features:
- Perfect for Distribution System Operators
- Clear indication of DNO cross polarity
- Indicates reversed Live/Neutral on a PME system
- Unique ground reference system helps eliminate user error
- Visual and audible indication
- Identifies up to 19 different wiring conditions
- Logical ‘Green for Go‘ LED indication
- One-button operation
- Continuous tone indicates good wiring
- Warbling tone indicates a fault condition
- Small, robust and simple to use
Why Choose the Socket & See SOK DSO?
The Socket & See SOK DSO has been developed specifically to help identify cross polarity on incoming customer supplies quickly, effectively and safely. Its unique requirement for the user to press the test button before testing provides a ground reference, helping to eliminate the possibility of an incorrect interpretation of the indication.
Unlike a standard plug tester, the SOK DSO also indicates reversed Live/Neutral on a PME system while offering clear visual and audible feedback, making it suitable for professional electrical testing where accurate polarity indication is essential.
Applications:
- Electricity distribution work
- Electrical inspection and testing
- Utility network testing
- Incoming supply polarity checks
- PME system testing
- General socket testing
- Fault finding on socket wiring
The tester is designed to provide clear indication of DNO cross polarity while also operating as a plug tester capable of identifying up to 19 different wiring conditions.
Technical Specifications:
| Features | |
| Power Supply | 230V |
| Input Current | <15mA |
| Frequency | 50Hz |
| Operating Temperature | 0–40°C |
| Humidity | <95% Non-condensing |
| Safety Compliance | BSEN 61010-1 |
| Duty Cycle | Non-continuous, <2 minutes |
| Wiring Conditions | Indicates up to 19 wiring conditions |
| Operation | One-button operation with user-provided ground reference |
| Indication | Visual and audible feedback |
❓ Frequently Asked Questions (FAQ)
Q1: What is the Socket & See SOK DSO?
A. The Socket & See SOK DSO is a polarity socket tester designed primarily for electricity distribution companies to identify DNO cross polarity on the incoming customer supply while also functioning as a plug tester.
Q2: What makes the Socket & See SOK DSO different?
A. The tester features a unique ground reference system. Before testing, the user presses the test button to provide a ground reference, helping to eliminate incorrect interpretation of the indication and reduce user error.
Q3: Can the SOK DSO detect reversed Live/Neutral?
A. Yes. The Socket & See SOK DSO is designed to indicate a reversed Live/Neutral on a PME system quickly, effectively and safely.
Q4: How many wiring conditions can the tester identify?
A. The Socket & See SOK DSO provides visual and audible indication of up to 19 different wiring conditions.
Why Buy from Acutest Direct?
When you buy the Socket & See SOK DSO Polarity Socket Tester from Acutest Direct, you can be confident you‘re purchasing genuine Socket & See test equipment backed by expert technical support, competitive pricing and fast UK delivery. Whether you‘re carrying out utility work, electrical inspections or polarity testing, the SOK DSO provides a dependable solution for identifying DNO cross polarity and wiring conditions.