shanghai san-凯时娱乐

sx721 portable ph/orp meter
    the most cost effective ph opr double-parameter meter, suited for industrial and mining factories, power plant, water treatment project and environmental protection industry, especially suited in field and on-site.

● built-in microprocessor chips, intelligent functions such as automatic calibration, automatic temperature compensation, data storage, function set-up, self-diagnose information, automatic power-off and low voltage display.
● double-parameter meter, equipped with three-in-one combination ph electrode and orp electrode, automatic identification of electrode by meter.
● automatic identification of 13 ph standard calibration solutions, three options of standard buffer solutions: europe and america series, nist series and china series.
● able to set ph measurement modes of high purity water and pure water with ammonia
● meter meets ip57 rating, equipped with calibration solution and portable case.

category product name basic 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 content series 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 certification iso9001:2000, ce and cmc
working condition

environment temperature

5 ~ 35 ℃(0.01grade)

environmental humidity


ip rating

ip57 dustproof and waterproof

1. model sx721 ph/orp meter 1unit
2. 201t-s plastic ph/atc three-in-one combined electrode 1pc
3. 301pt-s plastic orp combined electrode 3pc
4. ph standard buffer solution(ph4.00, ph7.00 and ph10.01/50ml) 1btl/each
5. 220mv orp standard solution(50ml) 1pc
6.screw driver 1pc
7. spare aa batteries 2pcs
8. operation manual 1pc
9. carrying case 1unit

accessory category



ph combination electrode

201t-s plastic three-in-one ph electrode

measure ph and temperature simultaneously, atc, suited for general ph measurement, 8 pin conncetor.

2503dt-s glass three-in-one combintion ph electrode

atc, suited for ph measurement of solution under low temperature and pure water, 8 pin connector.

glass flow cell

match 2503dt-s electrode.

orp combination electrode

301pt-s plastic orp combination electrode

suited for general orp measurement, 8 pin connector.

ph buffer

ph4.00 buffer


ph6.86 buffer


ph9.18 buffer


ph7.00 buffer


ph10.01 buffer


electrode soaking solution

ph(orp)combination electrode soaking solution


orp standard solution

222 mv orp standard solution


portable case

small portable case(255×210×50)mm

match single electrode.

big portable case(360×270×76)mm

match multi- electrode