No.

Company Name

Instrument Name and Model

Report Number

Instrument Principle

1

Testo Instruments International Trading (Shanghai) Co., Ltd.

testo350 flue gas SO2 analyzer

Certification (Recognition) No. 2018 - 003

Controlled potential electrolysis

2

Beijing SDL Technology Co., Ltd.

Model 3080 portable flue gas sulfur dioxide and nitric oxide analyzer

Certification (Recognition) No. 2018 - 256

Non-dispersive infrared

3

Horiba (China) Trading Co., Ltd.

PG-350 portable flue gas sulfur dioxide and nitric oxide analyzer

Certification (Recognition) No. 2019 - 065

Non-dispersive infrared/chemiluminescence

4

Tianjin Guoyang Technology Development Co., Ltd.

GYPG-001 portable flue gas sulfur dioxide and nitrogen oxides analyzer

Certification (Recognition) No. 2019 - 084

Ultraviolet differential

5

Shenzhen Guoyi Instruments Co., Ltd.

EM-3088 flue gas SO2 analyzer

Certification (Recognition) No. 2020 - 008

Controlled potential electrolysis

6

Hangzhou Chunlai Technology Co., Ltd.

EM-5P portable flue gas sulfur dioxide and nitrogen oxides analyzer

Certification (Recognition) No. 2020 - 009

Ultraviolet differential

7

Qingdao Laoying Environmental Technology Co., Ltd.

Laoying 3022 controlled potential electrolysis flue gas SO2 analyzer

Certification (Recognition) No. 2020 - 161

Controlled potential electrolysis

8

Nanjing Essen Environmental Technology Co., Ltd.

PAS X6 portable flue gas sulfur dioxide and nitrogen oxides analyzer

Certification (Recognition) No. 2020 - 196

Non-dispersive ultraviolet/non-dispersive infrared

9

Qingdao Laoying Environmental Technology Co., Ltd.

Laoying 3023 portable flue gas sulfur dioxide and nitric oxide analyzer

Certification (Recognition) No. 2020 - 199

Ultraviolet differential

10

Anhui Wanyi Technology Co., Ltd.

SG1500 portable flue gas sulfur dioxide and nitrogen oxides analyzer

Certification (Recognition) No. 2021 - 080

Ultraviolet differential

11

Qingdao Zhongrui Intelligent Instrument Co., Ltd.

ZR-3211 portable flue gas sulfur dioxide and nitrogen oxides analyzer

Certification (Recognition) No. 2021 - 143

Ultraviolet differential