WRFB-240M WRFB-240S WRMB-440M WRMB-440S Temperature transmitter

WRFB-240M WRFB-240S WRMB-440M WRMB-440S Explosion-proof Integrated temperature transmitter

Overview of WRFB-240M WRFB-240S WRMB-440M WRMB-440S Temperature transmitter

Explosion-proof Integrated temperature transmitter is the combination of temperature sensor and transmitter. In a very simple way, the temperature signal within the range of - 200 ~ + 1600 ℃ is converted into two-wire 4 ~ 20mA DC electrical signal and transmitted to the display instrument, regulator, recorder, DCS, etc., so as to realize the accurate measurement and control of temperature. Integrated temperature transmitter is an updated product of temperature measurement and control in modern industrial field and scientific research institutes. It is a necessary product of distributed system and digital bus system.

Working principle

WRFB-240M WRFB-240S WRMB-440M WRMB-440S Explosion-proof Integrated temperature transmitter uses the principle of gap explosion-proof. In case of explosion in the cavity, it can extinguish and cool through the gap of the joint surface, so that the full temperature of the flame after explosion cannot be transmitted outside the cavity, so as to carry out explosion-proof.

The thermoelectric potential (resistance) generated by the thermocouple (thermal resistance) generates an unbalanced signal through the bridge of the temperature transmitter, which is amplified and converted into a 4-20mA DC electrical signal to the working instrument, and the working instrument will display the corresponding temperature value.
Features of WRFB-240M WRFB-240S WRMB-440M WRMB-440S Temperature transmitter

Subminiature (module) φ forty-four × 18) Integrated and versatile
Two wire system 4 ~ 20mA DC output. Long transmission distance and strong anti-interference ability.
Cold end, temperature drift and non-linear automatic compensation.
High measurement accuracy and good long-term stability.
Epoxy resin pouring process is adopted inside the temperature module, which is suitable for all kinds of harsh and dangerous places.

Integrated design, simple and reasonable structure, which can directly replace ordinary assembled thermocouple and thermal resistance.

Mechanical protection IP65.
The use of thermocouple temperature change can avoid the use of compensation wire and reduce the cost
LCD, nixie tube, pointer and other indication functions are convenient for on-site timely monitoring.
When the field ambient temperature is > 70 ℃, the transmitter and field display instrument can be installed separately (isolated). If conditions do not permit, the method of extending the length of the protective tube can be used to protect the temperature transmitter.
Explosion proof grade: diibt4, diibt5. CT4. CT6
Protection grade: IP54, IP65
It can form an integrated field installation structure with thermocouple and thermal resistance, and can also be installed on the detection equipment and instrument panel as a functional module.

Main tech data of WRFB-240M WRFB-240S WRMB-440M WRMB-440S Temperature transmitter

Accuracy 0.2% F.S 0.5% F.S
Input thermocouple: B, s, t, K, j
Thermal resistance: PT100, pt10, cu100, cu50
Output 2-wire 4-20mA DC or 3-wire 4-20mA DC
Operating temperature: - 25-85 ℃ (0-60 ℃ for integrated LCD Meter)
Temperature influence ≤ 0.05% / ℃
Humidity 5-95% RH
There is no 3 1 / 2 LED 3 1 / 2 LCD 0-100 equal scale in the field display
Display accuracy: no digital: level 0.5, pointer type: level 2.0
Load capacity < 600 Ω (rated load 250 Ω)

Explosion-proof grade: dIIBT4, dIICT5, dIICT6

Model table