Gastec 121SP Quick-measuring Detector tubes Benzene C6H6 (0.2~ 66 ppm)

Name: Gastec 121SP Quick-measuring Detector tubes Benzene C6H6 (0.2~ 66 ppm)
Brand: Gastec

ຜູ້ຜະລິດGastec(ເບິ່ງສິນຄ້າອື່ນໆຂອງຍີ່ຫໍ້ນີ້)

Model121SP

ຕິດຕໍ່

ຈຳນວນ

ການຊຳລະເງິນທີ່ປອດໄພ

ການຮັບປະກັນຄຸນນະພາບ

ປ່ຽນ ແລະ ສົ່ງຄືນງ່າຍ

ມີບໍລິການຈັດສົ່ງ

Indicator: 0.2 to 20 ppm
Measuring Range:
+ 0.2 to 20 ppm, Number of Pump Strokes 3
+ 20 to 66 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: White → Brown
Reaction Principle: 2C6H6+ HCHO → C6H5CH2C6H5 + H2O, C6H5CH2C6H5 + H2S2O7 → Condensation polymer
Coefficient of Variation: 10% (for 0.2 to 5ppm) , 5% (for 5 to 20 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Catalog

Manual

Performance

Measuring Range	0.2 to 20 ppm	20 to 66 ppm
Number of Pump Strokes	3	1
Correction Factor	1	3.3
Sampling Time	2 minutes per pump stroke
Detecting Limit	0.1 ppm (n=3)
Colour Change	White → Brown
Reaction Principle	2C6H6+ HCHO → C6H5CH2C6H5 + H2O C6H5CH2C6H5 + H2S2O7 → Condensation polymer
Coefficient of Variation	10% (for 0.2 to 5ppm) , 5% (for 5 to 20 ppm)
Shelf Life	2 Years
Corrections for temperature & humidity	Unnecessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Hexane	≦ 500 ppm	No	No
Toluene	≦ 300 ppm	No	No
Xylene	≦ 350 ppm	No	No
Aromatic hydrocarbons other than benzene are trapped in the brown layer in the pretreatment tube. If the pretreatment reagent is entirely consumed (whole brown layer turns to dark brown), a higher reading will be given.

Calibration gas generation

Diffusion tube method

TLV-TWA	TLV-STEL	Explosive range
0.5 ppm	2.5 ppm	1.3 to 7.1%

ຕິດຕາມຂ່າວສານ ແລະ ຂໍ້ສະເໜີ

ຮັບສ່ວນຫຼຸດພິເສດຕາມປະລິມານ, ອັບເດດລາຄາຂາຍສົ່ງ ແລະ ການແຈ້ງເຕືອນສິນຄ້າໃໝ່ສົ່ງກົງເຖິງອິນບັອກຂອງທ່ານ.

ໂດຍການສະໝັກສະມາຊິກ, ທ່ານຍອມຮັບ ເງື່ອນໄຂການໃຫ້ບໍລິການ ແລະ ນະໂຍບາຍຄວາມເປັນສ່ວນຕົວ ຂອງພວກເຮົາ.

ການຊ່ວຍເຫຼືໍາດ່ວນ

ເຂົ້າເຖິງຜູ້ຊ່ຽວຊານທີ່ໄດ້ຮັບການຢັ້ງຢືນຂອງພວກເຮົາໂດຍກົງ