Uni-trend Voltage and Continuity Tester RCD Polarity Detection UT18C
Pre-order
Free Shipping from 30€ in Germany, 50€ in the EU!
- Pre-orders will be shipped in 5 working days.
- EU & US Countries Delivery Time: 10 working days.
- Other Countries Delivery Time: 15 working days.
- Pre-Ordering: If an item is unavailable, you can pre-order it. We'll dispatch once stock is replenished. For specific delivery times, please feel free to contact us for inquiries.
- 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 is a robust and reliable voltage and continuity tester specifically designed for challenging environments where darkness, humidity, and rain are common. This series of waterproof testers ensures a high level of safety, making it an ideal choice for professionals. It is certified to CAT IV 600V and CAT III 690V for voltage measurement, protecting users from transient overvoltages. With an IP65 waterproof rating, built-in illumination, RCD testing, and three-phase AC phase rotation testing, the UT18C is equipped to handle various demanding troubleshooting and maintenance tasks.
Key Features
- IP65 Waterproof Rating: Ensures reliable operation in wet and dusty conditions.
- High Safety Standards: Complies with double insulation, CAT III 690V, and CAT IV 600V safety requirements, and CE European Union standards.
- Live/Neutral Wire Identification: Single test lead measurement can identify live or neutral wires.
- Three-Phase AC Phase Rotation Test: Indicates the phase relationship of three-phase AC power.
- Continuity Test: Provides both buzzer and LED light indications for quick and clear results.
- Polarity Indication: Displays the positive and negative polarity of the measured conductor voltage.
- RCD (Residual Current Device) Test: Used for testing leakage protection switches.
- Built-in Illumination: Integrated flashlight for working in dark or poorly lit environments.
- Battery-less Detection: Capable of basic detection without battery power for certain voltage ranges.
- Dual Mode Operation: Choose between buzzer and silent modes.
- Voltage Over-range & Low Battery Indication: Alerts users to extreme conditions and low power.
- Automatic Functions: Features auto standby, auto range, and auto power-on when voltage exceeds 12V.
- Self-Test Function: Ensures the device is working correctly with full LED or LCD display.
- LCD Display: Clearly shows voltage and frequency readings.
- Data Hold: Freezes the current measurement on the display.
Benefits and Applications
The UT18C series is engineered for maximum safety and efficiency in challenging electrical testing scenarios. Its high CAT IV safety rating provides crucial protection against electrical surges, while the IP65 rating guarantees durability in harsh weather or dusty industrial settings. Electricians, maintenance technicians, and DIY enthusiasts can leverage its versatile features for:
- Verifying voltage presence in circuits, outlets, and electrical panels.
- Identifying live and neutral wires quickly and safely.
- Testing three-phase motor connections and rotation direction.
- Checking for continuity in cables, fuses, and switches.
- Ensuring proper function of RCDs to prevent electrical hazards.
- Troubleshooting electrical systems in dark attics, basements, or outdoor environments thanks to the built-in light.
- Performing essential checks even when batteries are depleted, for increased reliability.
The UT18C’s automatic functions and clear LED/LCD indications streamline the testing process, making it a professional-grade tool for accurate and secure 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 Germany, EU* countries and US
(For Products in Munich Warehouse, Long Beach Warehouse)
2.1 Orders with a value not exceeding €5:
Shipping Options:
| Shipping Options | Germany | EU* |
|---|---|---|
|
Deutsche Post |
€6 Arrive in 3-4 Business Days |
€15 Arrive in 5-9 Business Days |
| Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
€7.95 Arrive in 3-7 Business Days |
€8.95 Arrive in 5-9 Business Days |
|
UPS Express |
€13.95 Arrive in 2-4 Business Days |
€17.95 Arrive in 3-7 Business Days |
2.2 Shipping options for an order value between €5 and €30 inside Germany, €5 and €50 inside the EU, or €5 and €45 in the U.S.:*
Shipping Options:
| Shipping Options | Germany | EU* |
|---|---|---|
|
Deutsche Post |
€3.5 Arrive in 3-4 Business Days |
€6 Arrive in 5-9 Business Days |
|
DHL Paket |
€6 Arrive in 2-3 Business Days |
€15 Arrive in 3-7 Business Days |
|
DHL Express |
€14 Arrive in 1-2 Business Day |
€65 Arrive in 2-3 Business Days |
| Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
€4.95 Arrive in 3-7 Business Days |
€6.95 Arrive in 5-9 Business Days |
|
UPS Express |
€11.95 Arrive in 2-4 Business Days |
€13.95 Arrive in 3-7 Business Days |
2.3 Free shipping options for an order value of above €30 inside Germany, €50 inside the EU* or €45 in US :
| Free Shipping Options | Germany | EU* |
|---|---|---|
|
Deutsche Post |
Free Above €30 | Free Above €50 |
|
DHL Paket |
+ €2 for Above €30 / Free Above €60 | + €8 for Above €50 / Free Above €80 |
|
DHL Express |
+ €10 for Above €30 | + €60 for Above €50 |
| Free Shipping Options | Continental U.S. | Non-Continental U.S. |
|---|---|---|
|
USPS Ground Advantage |
Free above €45 | Free above €60 |
|
UPS Express |
+ € 8.95 for Above €45 | + € 11.95 for Above €45 |
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Certain EU Countries are not included in our EU Zone definition: United Kingdom (excluding Ireland), Switzerland, Liechtenstein, Vatican City, Albania, Belarus, Norway, Ukraine, and Iceland. For the above countries, the International Shipping Rule applies.
- The regions in the Non-Continental U.S. include: Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, the Armed Forces of America, the Armed Forces in Europe, the Armed Forces in the Pacific, and the U.S. outlying islands. The shipping and delivery to these areas are subject to the Non-Continental U.S. shipping rules.
2.4 Shipping Options for International Countries:
(via Deutsche Post or YunExpress)
| Order Amount | International |
|---|---|
| €0 - €15 | €8 |
| €15 - €30 | €7 |
| €30 - €50 | €6 |
| €50 and above | €4 |
Important Notice:
- Please verify the inventory location on the product page before placing your order to confirm delivery timeframes.
- For products in the Shenzhen warehouse, we will typically first ship the products from the Shenzhen warehouse to our Munich warehouse or Long Beach warehouse, which will take around 1.5 weeks. After we receive the shipment in Munich/ Long Beach, we will send the items to you. We will only arrange YunExpress shipping from Shenzhen for orders with products in the Shenzhen warehouse worth more than €50.
- If you place an order with products from both Munich and Shenzhen warehouses, we will first ship the products in the Munich warehouse, and then send the remaining products to you when we receive them from Shenzhen.
3. International Warehouse
3.1 German Warehouse
3.2 US Warehouse
3.3 Chinese Warehouse
4. Customs and Taxes
4.1 How are customs handled by OpenELAB for import or export?
4.2 How is VAT charged when the Customer places an order from OpenELAB?
4.3 What kind of fee will be charged except VAT?
Effective Date: August 7, 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.io 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 Europe, the US, or China.
- 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: 2.9% + €0.3
PayPal: 4.4%
