Shanghai San-Xin Instrumentation, Inc.

Home >products >Water Analyzer >Portable Handheld pH / mV / ORP multi-parameter Meter

Portable Handheld pH / mV / ORP multi-parameter Meter

Product Model: SX721
Price:  RMB 1760
Application Notes:  0
Location:  Shanghai

Product Detail Certification

Portable/Handheld pH/mV/ORP Meter
Model: SX721


Product Description

 Basic Specifications

CategoryProduct NameBasic features and specifications

Measuring range

(-2.00 ~ 19.99)pH


0.1/0.01 pH


Meter:±0.01pH; Overall: ±0.02pH

Input current

≤2×10-12 A

Input impendance

≥1×1012 Ω


±0.01 pH/3h
Temp. compensation range(0 ~ 100)℃(automatic)

Measuring range (mV/ORP/EH)

-1999mV ~ 0 ~ 1999mV




Meter:±0.1% FS, Overall: ±15mV
Other Technical Parameters

Data storage

200 groups
Storage contentSeries number, measuring value measuring unit and temperature,


Two AA batteries (1.5V x2)

Size and weight

meter:(65×120×31)mm/180g;Suitcase: (360×270×76)mm/1.6Kg
Quality and safety certificationISO9001:2000, CE and CMC
Working Condition

Environment temperature

5 ~ 35 ℃(0.01grade)

Environmental humidity


IP rating

IP57 Dustproof and waterproof


 Main Features

1. Special waterproof connector which four different electrodes can be plugged into, ability to automaticlly recognize different electrodes.

2. IP57 waterproof, applied even under the difficult conditions.

3. Automatic calibration, options of three series pH buffer solution.

4. Ability to set two special pH measurement modes of high purity water and ammonia  added purity water. 

5. 2503DT pure water pH electrode with a built-in temperature probe, applied in pH measurement of high purity water.

Packaging & Shipping

 Package List:

1. SX721 portable pH/ORP meter

2. Model 201T-S plastic pH/ATC three-in-one combination electrode

3. Model 301Pt-S ORP combination electrode

4. pH calibration solution (4.00, 7.00, 10.01pH/50ml)

5. ORP standard solution(222mV/50ml)

6. Carrying case

Company Information

 Company Profile:

Founded in 1991, Shanghai San-Xin Instrumentation Inc. specializes in research, manufacture and sale of electrochemical devices and electrodes ranging from pH, ORP, conductivity, ISE, DO to water hardness, turbidity, acid-alkali meters and electrodes. Our factory is located in Cao He Jing High-Tech Park, Shanghai, covering 1200 square meters.



San-Xin adheres to the philosophy of "honesty, sincerity, persistence and perfection" and the spirit of "credit, faith and trust" in pursuit of sustainable development. With efficient technology innovation, San-Xin's products and technology always maintain at the world-advanced level and ahead of counterparts in the domestic market. Up till now, San-Xin has successfully developed MP500 series of laboratory electrochemical devices, SX700 series of waterproof portable electrochemical instruments and SX600 series of waterproof pen testers. Newly developed benchtop and portable water hardness meters adopt electrode measurement and are the unique water hardness meters in the world which have won good reputation.


With 20 years of history, San-Xin always commits to brand development. Nowadays, San-Xin brand is renowned in both domestic and overseas market. Moreover, San-Xin series of products have been exported to many other countries and regions around the world. San-Xin's brand is expanding throughout the global market.



With ISO 9001:2000 certified, San-Xin has a strict quality management system. All the products are CMC and CE marked. San-Xin has outstanding research capability, advanced technology and high quality on the one hand and provides professional technique supports and after-sales service on the other. Backed by its core technology and innovation, San-Xin has established successfully long-term cooperations with many well-known international companies for whom San-Xin works as an OEM.


San-Xin will further implement brand development strategy, promote quality management system and information procedures, enhance customer satisfaction and create a win-win situation between San-Xin and its customers. San-Xin is developing and striving to achieve new leaps and more success.







Shanghai San-Xin Instrumentation, Inc.

Verified Industrial & Commercial Registration