Flameproof platinum resistor-Shanghai Jiutian Automation Equipment Co., Ltd.

Note: “t” is the absolute value of the temperature measured by the temperature sensing element, and the double platinum resistance is only supplied to the class B.

Thermal resistance allows current to pass

The measured current through the platinum resistor does not exceed 5 mA at the maximum.

The structure and principle of the explosion-proof thermal resistance and the fabricated thermal resistance are basically the same, the difference is that the junction box of the explosion-proof product (the outer casing)

) The design uses an explosion-proof special structure, and the junction box is die-casted with high-strength aluminum alloy, and has sufficient internal space and wall.

The industrial flameproof platinum resistor is a temperature sensor. It is widely used in industrial automatic control systems. Through the temperature sensor, the temperature parameter of the control object can be turned into an electrical signal, which is transmitted to the display, recording and adjustment instruments to detect, adjust and control the system.

In chemical plants and production sites, there are often various chemical gases and vapors that are flammable and explosive. If ordinary platinum resistors are used, they are very unsafe and can easily cause environmental gas explosion. Therefore, in these occasions, the explosion-proof thermocouple must be used as the temperature sensor. The flameproof platinum resistance products produced by our factory are suitable for use in the place where the explosive gas hazard exists in the temperature range of d II BT4~d II CT6.

The flameproof thermocouple produced by our factory adopts imported components as temperature sensing components, and its technical performance conforms to ZBY301-85 industrial platinum electrical technical conditions and indexing table. At the same time, the product meets the general requirements of explosion-proof electrical equipment for explosive environment GB3836.1-83, GB3836.2-83 standard.

◆ Main technical indicators

Range Specification

Model	Graduation	Measuring range℃	Accuracy Level	Allowable deviation△ t ℃
WZP WZP 2 WZPK WZPK 2	PT100	-200~500	A level	±（0.15+0.002\|t\|）
WZP WZP 2 WZPK WZPK 2	PT100	-200~500	B level	±（0.30+0.005\|t\|）

Explosion-proof type and class

Explosion-proof group: d II BT4 or d II CT4 ; d II BT6 or d II CT6

Enclosure protection rating: IP54

Principle structure

Thickness and mechanical strength, the thermal stability of rubber seals meets national explosion-proof standards. So, when the explosive mixture inside the junction box

When the body explodes, its internal pressure will not damage the junction box, and the resulting heat energy will not spread outward--explosion.

Due to the above special explosion-proof structure, the product is fully compatible with the use of d II BT4 to d II CT6 explosion-proof temperature.

Within the range of the group, as long as the user strictly abides by the product use rules, the product can achieve a reliable explosion-proof effect.

Description of the category, level and temperature group of electrical equipment:

Electrical equipment is divided into two categories: Class I - electrical equipment for underground coal mines;

Class II - electrical equipment for the factory

Explosion-proof grade

The explosion-proof grade of the explosion-proof thermal resistance is suitable for the maximum safety clearance of the explosive gas mixture, which is divided into three grades A, B and C.

Temperature group

The temperature group of the explosion-proof tropical internal resistance is divided into six groups of T1~T6 according to the highest surface temperature of the exposed part.

Types and Specifications of Flameproof Thermal Resistance

category	Model	Graduation	temperature range℃	Protective tube material	Thermal response time t0.5s	Nominal pressure Mpa	Structural characteristics	Specifications		Explosion-proof grade
								Total length L （ mm ）	Deep insertion l （ mm ）
Pt Thermal Resistance	WZP-24SA	PT100	-200~500	1Cr18Ni9Ti Stainless steel or0Cr18Ni 12M02Ti	≤ 90	10	M27*2 Fixed Thread Installation of Flameproof Connection Box	250 350 400 450 550 650 900 1150	100 200 250 300 400 500 750 1000	d IIBT4 d II BT6 or d II CT4 d II CT6
	WZP2-24SA
	WZP-44SA					6.4
	WZP2-44SA
	WZP-64S WZP2			1Cr18Ni9Ti		30	Conical protective tube M33*2	250 350 450	100 200 300

Types and Specifications of Flameproof Armoured Thermal Resistance

category	Model	Graduation	temperature Range℃	Protection tube diameterD （mm）	Thermal response time t0.5s	Nominal pressure Mpa	structure Features	Specifications		explosion-proof Grade
								Total lengthL （mm）	Deep insertionl （mm）
Pt Thermal Resistance	WZPK-24 WZPK2-24	PT100	-200- 500	φ 6 or φ 5	≤ 12 ≤ 8	10	Fixed Thread Installation of Flameproof Connection Box M27*2	300 350 450 550 650 900 1150	150 200 300 400 500 750 1000	d IIBT4 d IIBT6 or d IICT4 d IICT6
	WZPK-44 WZPK2-44					6.4	Installation of Flameproof Connection Box Fixed Flange

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Flameproof platinum resistor