Portable Immunoassay Systems: A VivaDiag Comparison Guide

Understanding the Market for Portable Immunoassay Systems

Point-of-care diagnostics continue to shift away from central laboratories toward settings where speed and sample simplicity matter most. Traditional fluorescence immunoassay (FIA) testing has historically been constrained by laboratory-bound instruments, large sample volume requirements, long turnaround times, and high operational costs—limitations that restrict timely diagnostics at the point of care. For organizations evaluating portable immunoassay systems, understanding how analyzer design, connectivity, and test menu breadth differ across generations is essential before committing to a platform.

VivaChek Biotech (Hangzhou) Co., Ltd., operating under the VivaDiag diagnostic product brand, has developed a line of FIA analyzers and companion test kits built to support quantitative immunoassay testing outside the central laboratory. This guide compares the company’s current and prior-generation portable analyzers, along with its flagship test kit, to help professional buyers assess which configuration fits their clinical workflow.

VivaDiag Portable FIA Analyzer VIM300H: The Current Generation

The VIM300H is VivaChek’s current portable analyzer, engineered for compact, professional-use point-of-care testing. It measures 146 x 77.6 x 55.5 mm and weighs 370 g, making it suitable for handheld use in ambulances, field settings, and bedside testing. Its 3.97-inch color touch screen supports intuitive operation, while its memory stores up to 10,000 results for record keeping and review across multiple testing sessions.

Key technical specifications of the VIM300H include:

• Battery runtime: up to 10 hours on a removable and rechargeable lithium battery, supporting continuous operation across clinical shifts
• Connectivity: USB, Wi-Fi, and optional Bluetooth, with an optional external Bluetooth printer
• Operation temperature: 5–40°C; storage temperature: -10–55°C
• Sample types supported: whole blood, serum, plasma, urine, hair, and other sample types
• Test menu: 39 venous-blood parameters and more than 20 capillary-blood-ready parameters
• Coding system: ID Card coding for parameter-specific calibration
• Unit conversion: supported

The analyzer ships as a complete deployment package that includes the VIM300H unit, a quality control ID card and test device, a power adapter, a Type C and USB 2-in-1 cable, a protective cover, a user’s manual, and a quick reference guide. Optional accessories include a Bluetooth printer, a charging station, and a backup battery. This configuration is intended for use by clinical laboratory professionals rather than for self-testing or near-patient testing, and it is positioned across a wide range of settings: GP clinics and surgeries, community health centers, township and rural clinics, walk-in care facilities, ambulances and paramedic units, mobile medical units, emergency department triage, urgent care centers, corporate and school health clinics, retail pharmacy testing services, home healthcare and domiciliary visits, research and field operations, and remote offshore and maritime stations.

As of the current production timeline, 32 sample units were made ready for distribution before the Mid-Autumn Festival, with approximately 78 finished units available for distribution by late October; trial production is scheduled to conclude in December.

Comparing Prior-Generation Models: VIM3000 and VIM220H

Buyers evaluating portable immunoassay systems often need to understand how newer models differ from earlier platforms still in circulation. VivaChek’s product history includes two prior analyzer generations, each addressing different deployment priorities.

The VIM3000 was designed for laboratory and fixed-location settings requiring built-in printing and wired network connectivity. It measures 192 x 209 x 169 mm and weighs 1.8 kg, considerably larger than the VIM300H. Its 7-inch color touch screen offers an expanded display for data review, and it includes a built-in thermal printer, eliminating the need for an external printing accessory. Connectivity options include an Ethernet port (RJ-45), USB, and Wi-Fi, supporting wired laboratory information system integration. Like the VIM300H, it retains a 10,000-result memory and operates at 5–40°C using a lithium battery.

The VIM220H represents an earlier, more compact design, weighing just 165 g with a 1.54-inch LCD display. Its small size (124.5 x 72.5 x 40 mm) supports maximum portability for mobile testing workflows where minimal size and weight take priority over display size and connectivity options. It uses a rechargeable lithium battery, supports an optional Bluetooth printer for result documentation without a built-in printer, and stores up to 999 results—a smaller capacity than later models. It does not offer Wi-Fi connectivity or unit conversion, reflecting its positioning as a lightweight, streamlined option rather than a feature-dense platform.

Together, these three generations illustrate a clear evolution: from the ultra-light VIM220H, to the larger, print-equipped VIM3000 suited to fixed laboratory settings, to the current VIM300H, which balances portability, battery life, connectivity, and an expanded test menu for professional point-of-care use.

The VivaDiag PSA Test Kit: Pairing Hardware with Quantitative Testing

A portable analyzer is only as useful as the test kits it supports. The VivaDiag Prostate Specific Antigen (PSA) Test Kit (FIA) is a fluorescence immunoassay designed for the quantitative determination of PSA in human whole blood (obtained by fingerstick or venipuncture), serum, or plasma, delivering results in 15 minutes.

This matters in the context of prostate cancer, which is the second most common cancer in men globally, with about 1.47 million new cases and about 400,000 deaths worldwide in 2022. Because early prostate cancer often presents with few or no symptoms, accessible screening and assessment tools are needed, particularly as aging populations increase disease burden. Central laboratory testing typically involves venipuncture, larger sample volumes, and longer turnaround—creating barriers to timely point-of-care assessment that the PSA Test Kit is designed to address.

Specifications include a sample volume of just 20 μL, enabling fingerstick whole blood testing with minimal patient burden. The measuring range spans 0.1–100 ng/mL for serum/plasma and 0.37–100 ng/mL for whole blood, with a cut-off reference range of 4 ng/mL. Precision data shows intermediate precision CV values of 4.97% at low concentration, 4.05% at medium concentration, and 4.69% at high concentration. The kit operates at 18–25°C and carries catalog number VID24-06-011. Each kit includes 25 test devices, 25 buffer tubes, 25 safety lancets, 25 alcohol prep pads, 25 x 20 μL pipettes, 25 x 75 μL pipettes, and 1 ID Card.

Regulatory Standing and Market Focus

VivaChek’s portable immunoassay systems are built around regulatory compliance for European markets. The company holds an EU Quality Management System Certificate under Regulation (EU) 2017/746 on In Vitro Diagnostic Devices, Annex IX Chapter I and III, and carries CE Marking with Notified Body Identification Number 0344, issued by DEKRA. The PSA Test Kit is IVDR-certified for professional use. The company’s priority markets include Germany, France, Italy, Spain, and the UK, with headquarters and manufacturing based in Hangzhou, Zhejiang, China.

Choosing the Right Configuration

For professional buyers comparing portable immunoassay systems, the decision often comes down to deployment context. Settings prioritizing mobility and battery endurance may find the VIM300H’s 10-hour runtime, 370 g form factor, and expanded 39-parameter venous-blood test menu well suited to ambulance, field, or bedside use. Fixed-location laboratories needing integrated printing and wired connectivity may reference the VIM3000’s built-in thermal printer and Ethernet support. Workflows prioritizing minimal size above all else may consider the VIM220H’s 165 g design. Across all configurations, the VivaDiag PSA Test Kit demonstrates how VivaChek pairs its analyzer hardware with quantitative, IVDR-certified reagent kits to extend prostate health assessment capability beyond the central laboratory setting.

https://www.vivachek.com
VivaChek Biotech (Hangzhou) Co., Ltd.