Uni-trend Voltage and Continuity Tester RCD Polarity Detection UT18C
📦 Location of the warehouse: China
Free Shipping from $50 in the US, $70 for non-continental US
- US Delivery Time: 2~7 Business days.
- Non-Continental US Delivery Time: 3~9 working days.
- Pre-Ordering: If an item is unavailable, you can pre-order it. We'll dispatch once stock is replenished, usually within 10 working days. Special pre-sale products will specify the expected arrival time in the description.
- Express Shipping: Need it faster? Contact us via email or through our live chat support, and we'll arrange expedited delivery for you.
Uni-trend Voltage and Continuity Tester RCD Polarity Detection UT18C
The UNI-T UT18C stands out as a robust and dependable voltage and continuity tester, specifically engineered for challenging work environments. It excels in conditions where darkness, humidity, and rain are prevalent, demanding the highest safety standards. Certified with CAT IV 600V and CAT III 690V ratings for voltage measurement, this tester provides crucial protection against transient overvoltages, ensuring both user safety and instrument longevity. Its IP65 waterproof and dustproof rating, coupled with integrated illumination, RCD testing, and three-phase AC phase rotation testing capabilities, makes the UT18C an indispensable tool for diverse and demanding troubleshooting and maintenance tasks.
Essential Features for Professional Use
- Superior IP65 Waterproof Rating: Guarantees reliable performance in the harshest wet and dusty environments.
- Adherence to High Safety Standards: Complies with double insulation, CAT III 690V, and CAT IV 600V safety requirements, alongside CE European Union standards, for unparalleled user protection.
- Precise Live/Neutral Wire Identification: Facilitates quick and accurate identification of live or neutral wires with a single test lead measurement.
- Advanced Three-Phase AC Phase Rotation Test: Accurately determines the phase relationship in three-phase electrical systems, crucial for motor and system installations.
- Clear Continuity Testing: Provides instant feedback with both a buzzer and LED light indicators for efficient continuity checks.
- Intuitive Polarity Indication: Displays the positive and negative polarity of the measured conductor voltage for precise diagnostics.
- Integrated RCD (Residual Current Device) Test: Allows for direct testing of leakage protection switches, enhancing electrical safety.
- Built-in Illumination: Features an integrated flashlight to brighten dark or poorly lit work environments, ensuring visibility and safety.
- Battery-less Operation for Basic Detection: Offers the capability for essential voltage detection even without battery power within specified ranges, increasing reliability.
- Flexible Dual Mode Operation: Users can choose between an audible buzzer mode or a silent mode for adaptable testing scenarios.
- Critical Voltage Over-range & Low Battery Indication: Provides timely alerts for extreme voltage conditions and low power levels, preventing unexpected interruptions.
- Smart Automatic Functions: Includes auto standby, auto range, and auto power-on (when voltage exceeds 12V) for enhanced convenience and efficiency.
- Comprehensive Self-Test Function: Ensures the device is operating correctly, with a full LED or LCD display check before use.
- Clear LCD Display: Offers precise voltage and frequency readings at a glance.
- Handy Data Hold Function: Allows users to freeze the current measurement on the display for easy recording and analysis.
Benefits and Versatile Applications
The UT18C series is meticulously engineered to maximize safety and efficiency across challenging electrical testing scenarios. Its exceptional CAT IV safety rating delivers critical protection against electrical surges, while the IP65 rating ensures enduring durability in severe weather or dusty industrial environments. This versatile tool is ideally suited for electricians, maintenance technicians, and even advanced DIY enthusiasts who can leverage its features for:
- Accurately verifying voltage presence in electrical circuits, outlets, and control panels.
- Safely and rapidly identifying live and neutral wires to ensure secure working conditions.
- Precisely testing three-phase motor connections and confirming correct rotation direction.
- Conducting thorough continuity checks on cables, fuses, and switches with clear indicators.
- Ensuring the proper functionality of RCDs to effectively prevent electrical hazards and enhance safety.
- Efficiently troubleshooting electrical systems in dark attics, basements, or outdoor settings, greatly aided by the built-in illumination.
- Performing essential checks even when batteries are depleted, ensuring continuous operation and increased reliability.
With its array of automatic functions and clear LED/LCD indications, the UT18C streamlines the testing process, establishing itself as a professional-grade instrument for accurate, secure, and highly reliable electrical diagnostics.
Technical Specifications
| Model | UT18C |
| Voltage Indication (V) | |
| 12V | 8V±2V |
| 24V | 18V±2V |
| 50V | 38V±4V |
| 120V | 92V±6V |
| 230V | 174V±8V |
| 400V | 320V±10V |
| 690V | 550V±15V |
| Phase Rotation Test | |
| Voltage Range | 100V～690V |
| Frequency | 50Hz～60Hz |
| Single Lead (L2) Measurement | |
| Voltage Range | 100V～690V |
| Frequency | 50Hz～400Hz |
| Continuity Test | |
| Resistance Range | 0～100KΩ (Buzzer and LED indication) |
| RCD Test | |
| Voltage | 230V |
| Frequency | 50Hz～400Hz |
| Polarity Measurement | Positive and Negative |
| Self-Test | Full LED or LCD display |
| Battery-less Detection | 50VAC/120VDC～690VDC/AC |
| Special Features | |
| IP Rating | IP65 |
| Auto Range | Full range |
| Over-voltage Indication | 713V～788V |
| Auto Standby | Standby current <10uA |
| Silent Mode | Full range |
| Illumination Function | Full range |
| Low Battery Display | 2.3V～2.5V |
| LCD Display (Voltage + Frequency) | 6V～690V (40Hz～400Hz) ±(1.5%+5) |
| General Characteristics | |
| Power Supply | 2 x 1.5V AAA batteries (R03) |
| LCD Size | 31mm × 20mm |
| Color | Red + Gray |
| Weight | 280g |
| Dimensions | 272mm × 85mm × 31mm |
| Standard Accessories | Batteries |
1. General Shipping Information
- We provide premium shipping methods with a tracking number for each order.
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Shipping address should be input in English without any special symbols to help the courier company recognize your address in the system. We will ship according to the shipping address you provided. Please notify us of any address change before your order is marked "Shipped" to avoid parcel loss.
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Please contact our customer service staff immediately if you need to cancel or change an order. Once your order has reached "Shipped" status, it can no longer be canceled or changed in any way. To avoid complications, please recheck your shopping cart before checkout.
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We can ship all in-stock orders within 1 business day as your order has been confirmed.
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All items are inspected before dispatch and are carefully hand-packed.
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With standard courier practice, you need to check the contents of the parcel before signing for your goods. Otherwise, we will not be held responsible for any damage that may have occurred in transit.
2. Shipping Options for Orders Inside U.S.
(For Products in the U.S. Warehouse, Shenzhen Warehouse)
2.1 Shipping options for an order value under $5 inside the U.S.
Shipping Options:
| Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
$9.99 Arrive in 3-7 Business Days |
$9.99 Arrive in 5-9 Business Days |
|
UPS Express |
$15.99 Arrive in 2-4 Business Days |
$19.99 Arrive in 3-7 Business Days |
2.2 Shipping options for an order value between $5 and $50 inside the U.S.
Shipping Options:
| Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
$5.99 Arrive in 3-7 Business Days |
$7.99 Arrive in 5-9 Business Days |
|
UPS Express |
$12.99 Arrive in 2-4 Business Days |
$15.99 Arrive in 3-7 Business Days |
2.3 Free shipping options for an order value of above $50 inside the U.S.:
| Free Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
Free above $50 | Free above $70 |
|
UPS Express |
+ $ 9.99 for Above $50 | + $ 12.99 for Above $50 |
Important Notice:
- Before placing your order, please check the inventory location on the product page to confirm the delivery timeframes.
- For products stored in the Shenzhen warehouse, we will ship them directly from Shenzhen, China.
- If you place an order for products from both the U.S. warehouse and the Shenzhen warehouse, we will ship your order separately: the products from the Shenzhen warehouse will be sent from Shenzhen, and the products from the U.S. warehouse will be sent from the U.S. warehouse.
3. International Warehouse
Our products are stored in both our U.S. and Shenzhen warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.
3.1 U.S. Warehouse
3.2 Chinese Warehouse
We will only arrange YunExpressexpress shipping from Shenzhen for orders with products in the Shenzhen warehouse worth more than €50. Orders directly shipped from our Shenzhen warehouse are handled by YunExpress. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors. Otherwise, the products will first be shipped from China to our U.S. warehouse and then shipped to the final destination.
4. Customs and Taxes
4.1 How are customs handled by OpenELAB for import or export?
We aim to minimize delays and ensure compliance, but OpenELAB does not guarantee exemption from U.S. customs charges.
4.2 Are U.S. sales taxes included when the Customer places an order?
If no sales tax is charged at the time of purchase, you may still be responsible for use tax according to your state’s tax laws. OpenELAB is committed to complying with the U.S. Supreme Court's decision in South Dakota v. Wayfair, Inc. and applicable local regulations.
4.3 Are there any other fees besides tax?
Please note that international shipments to the U.S. may occasionally incur customs clearance charges or carrier-imposed fees (e.g., by DHL, FedEx, or USPS). These charges are not controlled by OpenELAB and may vary based on the delivery carrier and U.S. import classification.
Effective Date: September 16th, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 30 days of the shipment date.
1. Warranty Disclaimer
Unless explicitly stated in a specific agreement or purchase order, OpenELAB makes no warranties—express or implied—regarding the fitness, suitability, or merchantability of any product for a particular purpose or special use.
2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
- Unauthorized repair attempts by the customer.
- The product is not defective but has been opened and is non-returnable by policy.
3. Returns & Refunds
If you're not satisfied with your purchase, you may be eligible for a return or exchange:
- Return for Refund: Within 15 days of receipt (unopened).
- Return for Replacement: Within 30 days of receipt (damaged or defective).
- Exchange Window: Up to 30 days from receipt.
Please email us at info@openelab.com for a return authorization before sending anything back.
Return Conditions
- Items must be in original, clean, and mint condition with packaging intact.
- Returns of damaged, used, scratched, modified, or programmed items will not be accepted.
- Include the receipt, a brief note with your name, order number, and reason for return.
Shipping & Fees
- Customers are responsible for return shipping to our warehouses in the US.
- If a return is requested due to customer reasons (e.g., change of mind, incorrect order, etc.), both the original shipping cost and the return shipping cost will be deducted from the refund amount.
- For returns due to customer reasons, we will generate and provide a return shipping label.
Payment Platform Fees
For all refunds requested due to customer reasons, a standard service fee will be deducted from the refund amount, which is charged by the payment platforms. The specific fees are as follows:
Shopify Payments: 3.5% + $ 0.3
PayPal: 4.4%
