The name RCYAGO has been commercially associated with Shenzhen Yage Technology. A U.S. trademark record indicates that SHENZHEN YAGE TECHNOLOGY LIMITED filed the RCYAGO trademark on April 21, 2016, with registration following on November 29, 2016. The original U.S. registration covered Class 18 goods, including backpacks, travel bags, suitcases, and other bags, and stated that the word “RCYAGO” has no foreign-language meaning. 1

Corporate information from the manufacturer, however, states that Shen Zhen Yage Technology Co., Ltd. was established in 2012 and is based in Shenzhen, Guangdong, China, describing itself as a maker of portable and digital measuring instruments. This creates a distinction where the company predates the RCYAGO trademark registration, and its later documented product portfolio focuses heavily on scientific, agricultural, and environmental measurement equipment rather than the bags listed in the initial trademark filing.

RCYAGO appears to be connected to the broader Yage Technology manufacturing operation in Shenzhen. Published contact information identifies the company as Shen Zhen Yage Technology Co., Ltd., while some materials use YAGO TECHNOLOGY LIMITED. Its published address is located in the Pinghu area of Longgang District, Shenzhen, Guangdong, China.

The same manufacturer also operates the YIERYI brand, which is described as having been registered in 2016. YIERYI’s product categories overlap substantially with those associated with RCYAGO, including pH meters, TDS meters, ORP meters, EC testers, dissolved-oxygen meters, soil meters, and digital scales. This suggests that RCYAGO functions primarily as one brand identity within the Shenzhen Yage technology and instrumentation business, rather than as a standalone multinational consumer-electronics corporation.

RCYAGO’s most recognizable product category is measurement and testing equipment.

Water-quality instruments

A significant portion of the RCYAGO lineup consists of instruments for measuring water chemistry. Products documented under the brand include:

• pH meters
• TDS meters
• EC/conductivity meters
• ORP meters
• Salinity meters
• Specific-gravity meters
• Temperature meters
• Multi-parameter water-quality testers
• Dissolved-oxygen meters

For example, the RCYAGO C-600A is documented as a seven-function water-quality tester capable of measuring pH, TDS, EC, ORP, specific gravity, salinity, and temperature. Another model, the DO9100 dissolved-oxygen meter, uses a probe-based system for measuring dissolved oxygen and temperature and has been available commercially since at least 2020. 2

RCYAGO instruments are used beyond household applications; academic and field research have documented their use for environmental and aquatic measurements. A 2024 scientific study, for instance, identified a RCYAGO DO9100 as the dissolved-oxygen instrument used for field measurements and named Shenzhen Yage Technology Limited as the manufacturer.

Gardening and agriculture

RCYAGO also produces equipment aimed at gardening, horticulture, agriculture, hydroponics, and irrigation. Examples include:

• Soil pH meters
• Soil moisture meters
• Soil-temperature testers
• Combined soil-testing instruments
• Automatic watering timers
• Wi-Fi irrigation controllers

Listings in Philippine marketplaces offer devices such as an RCYAGO three-in-one soil tester measuring soil pH, moisture, and temperature. The brand’s ECF-SGW08 is a Wi-Fi-controlled irrigation timer designed for garden hoses and automated watering, supporting two outlets and programmable schedules. 3

Food and beverage measurement

Some RCYAGO instruments target food processing and beverage applications. The manufacturer’s broader profile mentions applications in beer brewing, liquor production, sugar manufacturing, fruit-juice processing, and related food industries. Its catalog includes specialized pH and measurement instruments intended for food preparation and processing.

Scales and other instruments

The brand is also associated with digital scales, including coffee scales. Documentation for one RCYAGO coffee scale describes a 3 kg capacity, 0.1 g readability, timer functionality, tare function, LCD display, and automatic shutoff.

RCYAGO’s product philosophy centers on making traditionally laboratory-oriented measurements available in compact, portable, and relatively inexpensive electronic instruments. Depending on the model, features may include:

• Digital LCD displays
• Automatic temperature compensation
• Replaceable probes/electrodes
• Multi-parameter measurement
• Calibration functions
• Bluetooth connectivity
• Wi-Fi connectivity
• Smartphone/app integration
• Data monitoring
• Automatic watering schedules

The manufacturer’s broader portfolio explicitly includes portable digital refractometers, pen-type and online pH meters, TDS meters, ORP meters, EC testers, DO meters, soil meters, moisture meters, and digital scales. Some smart instruments utilize mobile connectivity; for example, the RCYAGO pH-W3988 is described as a Wi-Fi smart pH meter capable of measuring multiple water parameters and connecting to a Tuya-based smart-home system. 4

RCYAGO equipment is marketed or documented for a broad range of applications:

Independent research provides evidence of RCYAGO instruments being used for actual field measurements. One study of aquatic environments in the Philippines reported using RCYAGO pen-type devices for pH and TDS measurements and an RCYAGO portable refractometer for salinity measurements.

RCYAGO products are widely available through Philippine e-commerce channels, including Shopee Philippines and Lazada Philippines. Current marketplace listings feature products such as:

• 3-in-1 TDS/EC/temperature water-testing pens
• Soil pH/moisture/temperature testers
• Wi-Fi irrigation timers
• Multi-parameter water-quality meters

On Shopee Philippines, sellers such as yagoyago.ph list RCYAGO water-quality and gardening equipment. On Lazada Philippines, RCYAGO products appear in categories ranging from electrical circuitry and parts to electric insect killers and irrigation timers. 678 The existence of these listings indicates a noticeable consumer-market presence in the Philippines and Southeast Asia, although marketplace availability does not necessarily confirm the existence of an official national subsidiary or authorized distributor.

RCYAGO occupies a position between consumer electronics and technical instrumentation. Unlike brands focused exclusively on professional laboratory equipment, RCYAGO offers compact instruments intended for use by hobbyists, gardeners, aquarium owners, hydroponic growers, farmers, small businesses, students, environmental researchers, and food and beverage producers.

Products generally emphasize portability, multiple measurements in a single device, digital displays, and relatively accessible pricing. This makes the brand particularly visible in online marketplaces where inexpensive pH, TDS, EC, soil, and water-testing devices are popular.

The manufacturer states that products are tested and calibrated internally before release and claims the factory has obtained ISO9001:2008 quality-system certification, with products associated with RoHS and CE certifications. However, these statements should be interpreted on a model-by-model basis. A CE or RoHS reference for one product family does not guarantee identical certification across all RCYAGO products.

Similarly, claims of “high accuracy” in marketplace descriptions should not be equated with laboratory-grade analytical performance. For critical applications, calibration, probe condition, reference standards, and specific model specifications are more important indicators of reliability than the brand name alone.

RCYAGO instruments appear in genuine scientific and field contexts. Researchers have used them for measurements involving dissolved oxygen, pH, total dissolved solids, salinity, and electrical conductivity. A 2024 Microorganisms study specifically lists a RCYAGO DO9100 and identifies Shenzhen Yage Technology Limited as its manufacturer.

This does not imply equivalence with specialist laboratory brands such as Hanna Instruments, Hach, Thermo Fisher Scientific, or YSI. Rather, it demonstrates that certain RCYAGO instruments can serve as practical field-measurement tools in research settings.

The RCYAGO name has a distinct history. Early U.S. trademark documentation associates it with Shenzhen Yage Technology Limited and a 2016 filing date, covering primarily bags and travel goods. 1 However, the company’s later product ecosystem is overwhelmingly associated with measurement and testing instruments, meaning the trademark record alone should not be used to reconstruct the entire history of the modern RCYAGO product line.

It is also necessary to distinguish RCYAGO, YIERYI, and Yage/Yago Technology. While closely connected through the same Shenzhen manufacturing organization, they are not interchangeable names for the same consumer-facing brand. The manufacturer’s website explicitly presents YIERYI as a separate brand.

RCYAGO occupies the budget-to-midrange portable instrumentation segment rather than the premium professional laboratory segment. Strengths include a broad selection of inexpensive measuring instruments, multi-function meters, portable designs, international marketplace availability, and smart/Wi-Fi versions of some devices. Limitations tend to be model-specific; online customer ratings vary considerably between products, with some meters and irrigation devices showing mixed reviews. 5 Consequently, RCYAGO is best evaluated on a product-by-product basis rather than as having a uniform level of accuracy or quality.

RCYAGO is a Shenzhen-associated Chinese instrumentation brand linked to Shenzhen Yage Technology Co., Ltd. The company’s documented history extends back to at least 2012, while the RCYAGO trademark was filed in the United States in 2016. 1 Today, the name is most strongly associated with portable digital measurement equipment, particularly water-quality meters, pH/TDS/EC/ORP/salinity instruments, dissolved-oxygen meters, soil testers, refractometers, digital scales, and smart irrigation equipment. Its products have a significant presence in Philippine consumer marketplaces, while individual instruments have also appeared in scientific and environmental field research.

1. RCYAGO Trademark of SHENZHEN YAGE TECHNOLOGY LIMITED – Registration Number 5090908 – Serial Number 87010068 :: Justia Trademarks
2. Rcyago DO9100
3. Rcyago ECF SGW08
4. Rcyago PH W3988
5. Rcyago Device Database
6. RCYAGO WIFI Automatic Irrigation Timer: Smart Watering Timer for Garden Vegetables & Greenhouse
7. Buy RCYAGO Electrical Circuitry & Parts for sale online | Lazada Philippines
8. Buy RCYAGO Electric Insect Killers for sale online | Lazada Philippines