Measuring range:

1.DO9100 is a precision meter for measuring dissolved oxygen and temperature. The built-in microcomputer processor can calculate and compensate all measurement data related to dissolved oxygen and temperature. The shell of this instrument is waterproof, and the waterproof grade: IP67
2.2. This dissolved oxygen meter has two measurement units: % and mg/L.
3.The dissolved oxygen probe is a film with a polarographic sensor and a thermistor for temperature measurement and temperature compensation. The permeable film separates the measured solution from the sensing electrode, but allows oxygen to pass through the film to react , The solubility can be measured.

1. Dissolved oxygen: (0.0～40.0)mg/L 0.0-300.0%
2. Temperature: (0 ~ 40) °C 32.0-104.0°F
Precision:
1. Dissolved oxygen: ±1.5F.S.
2. Temperature: ±0.5°C
Resolution:
Dissolved oxygen:0.1MG/L
Oxygen concentration:0.1%
Temperature: 0.1°C 0.1°F
Automatic temperature compensation range: 0-40°C
Use environment: 0.1-40.0°C RH max: 90%
Size:183*37*37mm/7.2*1.5*1.5in 80g
Power supply: 1.5V button battery (4)
LCD
Automatic temperature compensation, fast response time
Portable, easy to carry
Instrument keyboard description:
Key Function
(switch) power on and off.
Calibration steps and use steps: see instructions for details
Restore factory settings:
When the instrument is turned on, press and hold the switch button for 5 seconds, release the button and the screen will show "----" to restore factory settings successfully

How to use and correct the procedure:

1.CAL calibration key (long press 5 seconds to enter the calibration interface)

2.HOLD lock/hold key, Fahrenheit/Celsius temperature conversion key.

3.DO9100 pen-type intelligent dissolved oxygen analyzer (hereinafter referred to as the instrument) is mainly designed to facilitate the user to carry on-site operation. The instrument can be divided into two parts: sensor and electronic unit. The sensor uses a polarographic film-type dissolved oxygen electrode. The electronic unit is composed of high integrated circuits. The instrument uses a dot-matrix liquid crystal display to display dissolved oxygen values and temperatures.

Packing List:

1 x Dissolved Oxygen Meter

1 x English Instruction Manual

10 set Zero oxygen reagent

Shenzhen Yieryi Technology Co., Ltd Company Profile

Company Overview

Shenzhen Yieryi Technology Co., Ltd was established in 2012 and is located in the Economic Development Zone of Shenzhen City, Guangdong Province. Leveraging our superior geographic location, convenient transportation facilities, outstanding research and development capabilities, exquisite craftsmanship, and comprehensive testing equipment, we are dedicated to providing high-quality measurement instruments and solutions to customers worldwide.

Our Products

As a professional manufacturer of measurement instruments, Shenzhen Yieryi Technology Co., Ltd primarily produces the following products:

· Portable and Digital Refractometers

· Pen-Type and Online Monitoring pH Meters

· DO Meters, TDS Meters, ORP Meters, EC Water Quality Testers

· Soil Testers

· Temperature and Humidity Meters

Our products are widely used in various fields, including beer brewing, liquor production, sugar manufacturing, fruit juice processing, agriculture, aquarium maintenance, hydroponics, environmental protection, food safety, education, military, and technology, catering to the diverse needs of different industries.

Why Choose Shenzhen Yieryi Technology Co., Ltd

Choosing Shenzhen Yieryi Technology Co., Ltd means you will enjoy the following unique advantages:

1. Excellence in Product Quality

· Strict Quality Control: All our products are certified under the ISO9001:2008 quality management system and possess ROHS, CE, and FCC certifications. Some products also hold design patents. Every product undergoes rigorous testing and calibration before leaving the factory to ensure high precision and reliability.

· High-Quality Materials and Craftsmanship: Located in Shenzhen’s Economic Development Zone, we are equipped with advanced manufacturing facilities and an experienced craftsmanship team, ensuring that each product boasts superior durability and performance.

2. Comprehensive Product Line

· Diverse Measurement Instruments: We specialize in manufacturing a wide range of products, including portable and digital refractometers, pen-type and online monitoring pH meters, TDS meters, ORP meters, EC testers, DO meters, soil pH and temperature & humidity meters, among others, to meet the diverse needs of various industries.

· Wide Application Fields: Our products are extensively used in beer brewing, liquor production, sugar manufacturing, fruit juice processing, agriculture, aquarium maintenance, hydroponics, environmental protection, food safety, education, military, and technology sectors, ensuring that you can find suitable solutions across different industries.

3. Technological Innovation and R&D

· Strong R&D Team: We boast a professional technical research and development team that continuously pursues technological innovation. We collaborate with multiple research institutions to develop new products, ensuring that our offerings remain at the forefront of the industry.

· Patent Protection: Some of our products feature unique designs and functionalities protected by design patents, enhancing their competitiveness and market uniqueness.

4. High-Quality Customer Service

· Professional Customer Support: Our customer service team is dedicated to providing timely and effective support, ensuring that you have peace of mind during the entire usage process.

· Personalized Solutions: We offer customized products and services tailored to the specific needs of our clients, accommodating various special requirements.

· Global Logistics Network: With a well-established global distribution system, we ensure that our products are delivered quickly and safely to customers around the world.

5. Reliable Market Reputation

· Stable Global Market Presence: Since starting our export business in 2013, our products have been successfully exported to Europe, America, Southeast Asia, and the Middle East, achieving an annual sales volume of USD 5-10 million. We have earned the trust and praise of customers worldwide.

· Brand Influence: Our brand “YIERYI,” registered in 2016, has consistently focused on the theme of health. With a design that is simple, stylish, and portable, we are committed to bringing health concepts into every home and every corner of the world.

6. Sustained Corporate Spirit

· Unity, Diligence, Exploration, and Innovation: We firmly adhere to the corporate spirit of “Unity, Diligence, Exploration, and Innovation,” continuously striving for excellence, exceeding customer expectations, and building long-term partnerships.

Our Vision

Shenzhen Yieryi Technology Co., Ltd is committed to driving business growth and success for our clients through continuous innovation and exceptional service. We aim to establish the “YIERYI” brand as a globally recognized health technology brand, promoting health concepts into every home and every corner of the world.

Conclusion

By choosing Shenzhen Yieryi Technology Co., Ltd, you will receive high-quality products, advanced technical support, comprehensive customer service, and a reliable partnership. Let’s work together to create a prosperous future and move towards a more prosperous and sustainable tomorrow!