UNI-T UT281C True RMS Flex Clamps
- AC Current: Up to 3000A
- True RMS: Accurate non-sinusoidal AC
- Flex Coil: 18-inch flexible probe
- Durability: IP54, 2m drop-proof
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Description
Introducing the UNI-T UT281C Flex Clamp
The UNI-T UT281C True RMS Flex Clamp is a sophisticated measurement device engineered to address the complexities of electrical current measurement in demanding and often hard-to-reach environments. As part of UNI-T’s acclaimed Pro Line series, even though it has been discontinued, its robust capabilities and design continue to make it a valuable asset for professionals. This innovative tool features a flexible Rogowski coil that allows it to accurately measure large AC currents up to an impressive 3000A. This design is particularly beneficial in situations where traditional rigid clamp meters are impractical due to space constraints or the irregular shape of conductors. The UT281C emphasizes ease of operation, delivers highly accurate readings, ensures stable performance, and provides reliable quality, making it an indispensable instrument for electricians and technicians requiring precision and durability.
Built for Demanding Professional Environments
The UNI-T UT281C is meticulously constructed to endure the rigors of harsh professional environments, guaranteeing both reliability and extended operational life. Belonging to UNI-T’s prestigious Pro Line series, this device adheres to rigorous industrial standards for resilience. It boasts an impressive IP54 rating, providing substantial protection against the ingress of dust and resistance to water splashes. This makes the UT281C a reliable tool for consistent performance in various challenging settings, including dusty industrial plants, construction sites, or exposed outdoor electrical installations. Furthermore, the UT281C is engineered with 2-meter drop-proof capability, offering significant peace of mind to users. This robust construction ensures that the meter remains fully functional even after accidental drops, minimizing downtime and the need for costly replacements in the field.
Advanced Measurement Capabilities for Accuracy
The UNI-T UT281C is equipped with advanced measurement capabilities that ensure high accuracy and reliability, particularly for complex electrical systems. Its True RMS (Root Mean Square) function is crucial for accurately measuring AC currents, especially in the presence of distorted or non-sinusoidal waveforms, which are common in modern power electronics and variable frequency drives (VFDs). This feature guarantees that technicians receive precise readings essential for effective diagnostics and troubleshooting. The device offers a versatile AC current range of 30A/300A/3000A, enabling it to cater to a broad spectrum of measurement needs, from smaller commercial circuits to high-power industrial applications. Its frequency response of 45Hz~500Hz ensures accurate measurements for standard sinusoidal currents.
Specialized Applications in Diverse Industries
The UNI-T UT281C shines in specific applications where its flexible design and high-current measurement capabilities are critical. Its Rogowski flex coil with a 45.7cm (18 inch) bending length and a radius of 3.1 inches (8cm) makes it ideal for measuring current in extremely tight or awkward spaces, such as crowded electrical panels, busbar systems, or large cable bundles where traditional rigid clamp meters cannot access. This instrument is frequently utilized by electricians for monitoring large current loads in industrial machinery, including motors, generators, and transformers, helping to ensure they operate efficiently and safely within their designated parameters, thereby preventing potential damage from overloads.
A key capability of the UT281C is its inrush current measurement, accessible with a simple 2-second long press of the INRUSH key. This function is vital for capturing and analyzing the momentary high current spikes that occur when electrical equipment powers on. This data is indispensable for correctly sizing circuit breakers and fuses and for diagnosing transient operational issues. Furthermore, the UT281C is an excellent tool for troubleshooting power quality issues in distribution networks, identifying current imbalances, and detecting potential faults in complex electrical infrastructures. Its versatility makes it an indispensable asset for maintenance, installation, and diagnostic work across various sectors, including utilities, manufacturing, and commercial building management.
TPT24: Global Assurance of Quality & Delivery
For professionals seeking to acquire the authentic UNI-T UT281C True RMS Flex Clamp, TPT24 stands as the unparalleled global online retailer. TPT24 is firmly committed to delivering genuine products, backing every purchase with an ironclad guarantee of authenticity and superior quality. This unwavering dedication ensures that customers receive a reliable and high-performing tool that rigorously adheres to UNI-T’s esteemed manufacturing standards. Beyond product integrity, TPT24 distinguishes itself with seamless worldwide delivery, ensuring that this essential measurement instrument is accessible to technical professionals in every corner of the globe. Regardless of your geographical location, TPT24 provides a streamlined and efficient purchasing experience, giving you the utmost confidence that your specialized tools will arrive securely and promptly, ready for immediate deployment in your critical operational tasks.
User-Centric Design for Enhanced Workflow
The UNI-T UT281C incorporates a range of user-centric features designed to optimize operational efficiency and user convenience. Its large LCD display provides clear and easily legible readings, even in challenging lighting conditions, further enhanced by a backlight function for dimly lit environments. This ensures that critical measurements are always visible and interpretable. The device features a data hold function, allowing users to freeze the current measurement on the screen, which is particularly beneficial when taking readings in difficult-to-access areas where immediate recording is not feasible.
Additionally, the UT281C includes an auto power off function, a smart energy-saving feature that significantly extends battery life by automatically shutting down the device after a period of inactivity. A low battery indication alerts users when battery levels are critical, preventing unexpected power loss during important measurements. The manual range selection for current measurement provides experienced users with precise control over their readings, while the overall intuitive function selection simplifies operation for all skill levels. These thoughtful design elements collectively contribute to a highly efficient, reliable, and user-friendly experience, making the UT281C a preferred tool for professionals.
Ergonomics and Comprehensive Package Inclusions
The UNI-T UT281C is meticulously designed with ergonomics in mind, complementing its powerful functionality with a user-friendly form factor. Weighing approximately 236g and with product dimensions of 350mm x 190mm x 55mm, it strikes an excellent balance between robustness and portability, minimizing user fatigue during prolonged use. The key to its versatility is the flexible Rogowski coil, which boasts a 0.75cm diameter and an impressive 45.7cm (18 inches) bending length with a 3.1-inch (8cm) radius, allowing it to effortlessly encircle conductors in the most confined or complex spaces that would be impossible for rigid clamp meters.
The standard package for the UT281C includes essential accessories, starting with three 1.5V R03 batteries, ensuring the device is ready for immediate operation right out of the box. Each unit is thoughtfully packaged in a gift box, accompanied by a comprehensive English manual. This attention to detail in packaging and accessory inclusion means that users have everything necessary to quickly get started with accurate and efficient measurements. This comprehensive approach underscores UNI-T’s commitment to providing a complete, ready-to-use solution for electrical measurement professionals.
Specifications
| Specifications | Range | UT281A | UT281C | UT281E |
| AC current (A) | 30A/300A/3000A | ±(3%+5) | ±(3%+5) | ±(3%+5) |
| Frequency response | 45Hz~500Hz
(sine wave) |
√ | √ | √ |
| Inrush current | 0.5A~3000A
(for reference) |
√ | √ | √ |
| AC voltage (V) | 600V | ±(1.2%+3) | ||
| Resistance (Ω) | 60MΩ | ±(1.2%+3) | ||
| Frequency (Hz) | 20Hz~30kHz | ±(1%+2) | ||
| Features | ||||
| Range selection | Manual | Manual | Auto (manual range available in current measurement) | |
| Flex coil size | 10”(25.4cm) radius: 1.5”(3.8cm) |
18” (45.7cm) radius: 3.1”(8cm) |
18” (45.7cm) radius: 3.1” (8cm) |
|
| Display count | 3000 | 3000 | 6000 (3000 in current measurement) |
|
| Refresh rate | 3 times/s | 3 times/s | 3 times/s | |
| True RMS | √ | √ | √ | |
| Display interface (LCD) | Single | Single | Dual | |
| Data hold/Buzzer | √ | √ | √ | |
| Auto power off | √ | √ | √ | |
| Low battery indication | √ | √ | √ | |
| Backlight/Function selection | √ | √ | √ | |
| 2m drop test | √ | √ | √ | |
| IP rating | IP54 | IP54 | ||
| General Characteristics | ||||
| Power | 1.5V battery (R03) x 3 | |||
| Display | 32 x 34mm (1.8 inches) | |||
| Product color | Red and grey | |||
| Product net weight | UT281A: 220g; UT281C: 236g; UT281E: 250g | |||
| Product size | UT281A: 300mm x 150mm x 55mm; UT281C: 350mm x 190mm x 55mm; UT281E: 325mm x 180mm x 30mm | |||
| Standard accessories | Batteries, PC software CD (UT281A), test leads (UT281E) | |||
| Standard individual packing | Gift box, blister, English manual | |||
| Standard quantity per carton | UT281A/UT281C: 8pcs; UT281E: 10pcs | |||
| Standard carton measurement | UT281A: 580mm x 380mm x 180mm; UT281C: 420mm x 355mm x 425mm; UT281E: 435mm x 380mm x 245mm | |||
| Standard carton gross weight | UT281A: 4.9kg; UT281C: 6.2kg; UT281E: 6.3kg | |||













