Explosion proof electric contact bimetal thermometer
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Description
The shell of wssx series explosion-proof electric contact bimetal thermometer is made of aluminum alloy. Through the aluminum alloy shell, the circuit that may generate sparks and electric arc in the instrument is separated from the explosive gas mixture outside the case, so as to achieve the purpose of explosion-proof.
The performance of explosion-proof bimetallic thermometer with electric contact conforms to bg3836 1-2000 "explosion proof electrical apparatus for explosive gas atmospheres - Part 1: General requirements" and GB3836 2-2000 "explosion proof electrical apparatus for explosive gas atmospheres - Part 2: flameproof electrical apparatus" d ".
Explosion proof electric contact bimetal thermometer is equipped with electrical contact device, that is, mechanical electrical contact. When the temperature of the measured medium changes, the fine shaft on the free end and the steering transmission mechanism drive the pointer and moving contact to rotate, indicating the temperature change value on the scale plate. When it contacts or disconnects with the fixed contact (upper and lower limit fixed contact), the relay and contactor in the circuit system act to achieve the purpose of automatic control and alarm.
Wssx series explosion-proof electrical contact bimetallic thermometer is a single needle type indicating thermometer, which uses the bimetallic sheet wound into a spiral tube, which is fixed at one end and connected with the pointer at the other free end. It rotates with the change of temperature and drives the pointer to rotate to indicate the temperature. It is the temperature measurement of liquid, steam, gas medium and solid surface in the range of - 80 to + 500 ℃ in the production site of petroleum, coking, chemical, pharmaceutical and other enterprises.
Main technical parameters
Nominal diameter of dial: 100
Thermal response time: ≤ 40s
Flameproof grade: diibt4
Rated power: 10va
***High working voltage: 220 V
***High working current: 0.7A
Product selection table of explosion proof electric contact bimetal thermometer:
WSS | Bimetal thermometer | ||||||
X | Electric contact | ||||||
-4 | Dial diameter Φ one hundred | ||||||
Dial form | zero | axial | |||||
one | radial | ||||||
eight | universal | ||||||
Installation and fixation form | zero | No fixed device | |||||
one | Movable external thread | ||||||
two | Movable internal thread | ||||||
three | Fixed thread | ||||||
four | Fixed flange | ||||||
five | Ferrule thread | ||||||
six | Ferrule flange | ||||||
Flameproof | B | Explosion proof grade ExdIIBT4 | |||||
Contact protection form | M | Upper and lower limits (not indicated) | |||||
N | Double upper limit | ||||||
P | Double lower limit |
Description of model selection parameters: after selecting the above models, the temperature measurement range of the thermometer (recommended range scale range: 1.5 ~ 2 times of the normal operating temperature), insertion depth, probe rod diameter, probe rod material, working pressure of the measured medium, etc
Specification and model:
model | Temperature measurement range (℃) | Accuracy class | Protective tube material | Specifications | Installation device |
WSSX-410B | -80-+40 -40-+80 0-50 0-100 0-150 0-200 0-300 0-400 0-500 | one point five | 1Cr18NI9Ti three hundred and four three hundred and sixteen 316L Hastells C-276 H.AIIoyc-276 | seventy-five one hundred one hundred and fifty two hundred three hundred four hundred five hundred seven hundred and fifty one thousand | Thread without fixture |
WSSX-480B | |||||
WSSX-411B | Movable external thread | ||||
WSSX-481B | |||||
WSSX-412B | Movable internal thread | ||||
WSSX-482B | |||||
WSSX-413B | Fixed flange | ||||
WSSX-483B | |||||
WSSX-414B | Fixed thread | ||||
WSSX-484B | |||||
WSSX-415B | Ferrule thread | ||||
WSSX-485B | |||||
WSSX-416B | Ferrule flange | ||||
WSSX-486B |