The SBW series explosion-proof and intrinsically safe temperature transmitter with thermocouple or thermistor is a field installed temperature transmission unit in the DDZ-S series instruments. It integrates a thermocouple (resistor) and a transmitter to directly measure the temperature of liquids, vapors, and vapor media within the range of -200~800 ℃ in various industrial processes. The temperature is converted into a 4-20mADC unified output signal proportional to the temperature of the thermocouple thermistor or the output electrical signal, which is sent to display, record, adjust instruments or computers.
SBW series explosion-proof temperature transmitterThe intrinsically safe temperature transmitter with thermocouple or thermistor is a field installed temperature transmission unit in the DDZ-S series instruments. It integrates a thermocouple (resistor) and a transmitter to directly measure the temperature of liquids, vapors, and vapor media within the range of -200~800 ℃ in various industrial processes. The temperature is converted into a 4-20mADC unified output signal proportional to the temperature of the thermocouple thermistor or the output electrical signal, which is sent to display, record, adjust instruments or computers. The explosion-proof performance of explosion-proof and intrinsic safety thermocouple (resistor) temperature transmitters is designed and manufactured in accordance with the national standard for 'Explosion proof Electrical Equipment for Explosive Environments' (GB3836). The thermoelectric characteristics comply with international IEC standards and have been tested and qualified by the National Instrument Explosion proof Safety Supervision Station. It is an ideal integrated product for temperature sensor transmission in explosive environments, which can be used in hazardous areas with flammable gases or vapors of flammable liquids. The intrinsically safe thermocouple (resistor) temperature transmitter must be combined with the associated equipment safety barrier to form an explosion-proof system. The explosion-proof certificate numbers are GYBJ93265, 93266, 97336, 97337. As a new generation temperature transmitter, it can be widely used in various departments such as metallurgy, petroleum, chemical, power, light industry, textile, food, national defense, and scientific research.
The explosion-proof cable distribution parameter control range for intrinsically safe temperature transmitters with thermocouples is: total inductance ≤ 2mH. Total electrical capacity ≤ 0.06uF. At the same time, associated equipment safety barriers are used, with models MTL728, Z928, LB928, and safety barriers. For specific wiring, please refer to the manufacturer's instructions.
Characteristics of explosion-proof intrinsic safety type temperature transmitter with thermocouple (resistor):
The transmitter components are miniaturized and placed inside the junction box of explosion-proof and intrinsically safe thermocouples (resistors) to form an integrated temperature transmitter, used in industrial sites.
As an integrated temperature transmitter, it can directly output 4-20mA signals in industrial sites, which not only saves expensive compensation wires but also improves the anti-interference ability during long-distance signal transmission.
The transmitter components have high precision, low power consumption, wide temperature range, stable and reliable operation, and due to the use of silicone rubber sealing structure, the transmitter is shock resistant, temperature resistant, moisture resistant, and explosion-proof, suitable for installation and use in various harsh on-site environments.
Choose explosion-proof temperature transmitters with thermocouples (resistors) to isolate the input and output terminals, increasing their resistance to mode interference and making them more suitable for computer use.
Main technical specifications of explosion-proof temperature transmitter
Thermal response time: see instruction manual
Accuracy level of platinum thermistor: Class B
Division number: Pt100. (resistance value at 0 ℃)
R=1000.12 Ω (Class B)
Allowable deviation: Δ t (℃) ± (0.30+0.005 ∣ t ∣) (Class B)
Input: Thermocouple: K, E
Thermal resistance: Pt100
Output: Within the range of measurement, output a 4-20mA DC signal that is linear with the input electrical signal of the thermistor or the millivolt signal input by the thermocouple, and linear with the measured temperature of the thermistor or thermocouple.
Basic error: Calculation formula Δ=Δ 1+Δ 2
Allowable deviation of Δ 1 thermocouple (resistance)
Δ 2 transmitter basic error ± 0.5% FS
Transmission method: two-wire system
Transmitter working power supply: voltage ranging from 12V to 35V, rated working voltage of 24V.
Load: The maximum load resistance is calculated according to the following formula
RL(max)=50×(Vmin-12)
At 24V, the load resistance can be selected within the range of 0-600 Ω, with a rated load of 250 Ω. )
a. Environmental temperature: -25 ℃ to 80 ℃ (not higher than 70 ℃ in hazardous areas).
b. Relative humidity: 5% to 95%.
c. Mechanical vibration: f ≤ 55Hz, amplitude<0.5mm
d. There is no medium in the surrounding air that can cause corrosion of the transmitter.
Explosion proof grade:
Explosion proof type: d Ⅱ BT4d Ⅱ BT6 or d Ⅱ CT4d Ⅱ CT6
Intrinsic safety type: ib Ⅱ BT4ia Ⅱ BT4ia Ⅱ CT6 (multi pair), associated equipment models MTL728, Z928, LB928.
Shell protection level: IP65
Allowable deviation of electromotive force
| category | graduation mark | level | Operating temperature range ℃ | Allowable deviation △ t ℃ |
| thermocouple | E | Ⅱ | 0~600 | ± 2.5 ℃ or ± 0.0075t |
| Nickel chromium copper nickel |
| thermocouple | K | Ⅱ | 0~800 |
| Nickel chromium copper silicon |
| Thermocouple WZP | Pt100 | A | -50~500 | ±(0.15+0.002t |
| B | ±(0.30+0.005t |
Note: ① is the measured temperature (℃) ② The maximum allowable deviation is * A * for special product orders.
Explosion proof grade marking instructions
| Specifications | Content |
| d | | flameproof type |
| ib | | Intrinsic safety type |
| ia | | Intrinsic safety type |
| | Electrical equipment category: | | (Factory electrical equipment) |
| | Explosion proof equivalent pole | | Explosion proof type: B-pole, C-pole |
| | Temperature Class | Explosion proof type: T1~T6 |
| Intrinsic safety type: T1~T6 |
| □ | Ⅱ | □ | □ | |
Categories of electrical equipment
Electrical equipment is divided into two categories
Class I - Electrical equipment used underground in coal mines.
Class II - Factory Electrical Equipment
Explosion-proof rating
The explosion-proof level of explosion-proof and intrinsic safety thermocouples is classified into three levels: A, B, and C, based on the maximum safe clearance or minimum ignition current ratio applicable to explosive gas mixtures
Temperature Class
The maximum surface temperature (exposed part) allowed for explosion-proof and intrinsic safety thermocouples (resistors) is divided into six groups, T1 to T6.
| Temperature Class | Maximum allowable surface temperature ℃ |
| T1 | 450 |
| T2 | 300 |
| T3 | 200 |
| 4 | 135 |
| T5 | 100 |
| T6 | 85 |
Insulation resistance of thermocouple
When the ambient air temperature is between 15-35 ℃; When the corresponding humidity is 45% and the atmospheric pressure is 86-106KPa, for thermocouples with a length exceeding 1m. Its insulation resistance value at room temperature multiplied by its length should not be less than 1000M Ω, and the test voltage is DC 500 ± 50V. The insulation resistance of armored thermocouples (insulated type)
At an ambient temperature of 20 ± 15 ℃ and corresponding humidity not exceeding 80%, the insulation resistance value at room temperature should not be less than 100M Ω, and the test voltage should be DC 100V.
Thermal resistance allows current to pass through
The maximum current measured through a platinum resistor shall not exceed 5mA.
□ Model representation
| S | DDZ-S series electric unit combination instrument |
| B | Transmission unit |
| W | temperature |
| □ | Universal Type (None) |
| Z thermistor |
| R thermocouple |
| □ Output nature | 2) Output and corresponding temperature |
| | 4) The output is linear with the corresponding input signal |
| □ Sensor | 0) Universal type |
| thermocouple | 0) E nickel chromium copper nickel |
| 1) K nickel chromium nickel silicon |
| 2) S Platinum Rhodium 10 Platinum |
| thermal resistor | 1)Cu50 |
| 2)Cu100 |
| 3)Pt100 |
| □ Circuit category | 7) Isolation type (with temperature measuring element) |
| 8) Non isolated type (with temperature measuring element) |
| □ Device category | 0) Type |
| 1) Intelligent type |
| 2) Digital display type |
| 3) Pointer type |
| 4) Intelligent digital display type |
| 5) Intelligent pointer type |
| 6) Equipped with communication protocol |
| □ Installation fixed form | 2) Fixed thread |
| 4) Fixed flange |
| 6) Fixed thread conical protective tube |
| 8) Internal thread fixation |
| 9) Hot sleeve protective tube |
| □ Form of junction box | 4) Explosion proof type |
| □ Design number | S) Introducing platinum resistors |
| 0) Thermocouple |
| 1) Insulated (armored) |
| 2) Shell type (armored) |
| Number of components | 3) Triple Pair |
| □ Additional explanation | K) Armored type |
| □ Environmental characteristics | d) Explosion proof type |
| i) Intrinsic safety type |
□ Type and specification
Specification Table for Explosion proof and Intrinsic Safety Temperature Transmitters with Thermocouples
| model | graduation mark | measurement range | structural characteristics | Protective tube material | Specifications | Thermal response time | Nominal Pressure | Explosion-proof rating |
| | (℃) | | | Factory L (mm) | Insertion depth ò (mm) | (S)T0.5 | (MPa) |
| SBWR-2280/240d | K | 0-400 | M27 ´ 2 fixed thread | 1Cr18Ni9Ti or 0Cr18Nni12M02Ti | T4L=ò+150 T6 L=ò+250 | 150 | £90 | 10 | BIIBT4 or |
| SBWR-2280/240i | 0-600 | | |
| SBWR-4280/240d | 0-800 | 200 | BIICT4 or ibIIBT4 |
| SBWR-4280/240i | 200-500 | | |
| SBWR-4270/240d | 400-800 | 250 | |
| SBWR-2180/240d | E | 0-400/0-500 | 1500 | |
| SBWR-2180/240i | 0-600 | | |
| SBWR-4180/240d | 100-300 | 2000 | |
| SBWR-4180/240i | 200-400 | | |
| SBWR-4170/240d | 200-600 | | |
| SBWR-2280/440d | K | 0-400 | Fixed flange | | £90 | 6.4 | |
| SBWR-2280/440i | 0-600 | | |
| SBWR-4280/440d | 0-800 | | |
| SBWR-4280/440i | 200-500 | | |
| SBWR-4270/440d | 400-800 | | |
| SBWR-2180/440d | E | 0-400 | | |
| SBWR-2180/440i | 0-500 | | |
| SBWR-4180/440d | 0-600 | | |
| SBWR-4180/440i | 100-300 | | |
| SBWR-4170/440d | 200-400 | | |
| SBWR-4170/640d | 200-600 | | |
| SBWR-2180/640d | | | |
| SBWR-4280/640d | | | |
| SBWR-4270/640d | k | 0-400/0-600 | taper | | 150 | 30 | BII BT4 or bIICT6 |
| SBWR-2280/640d | 200-500 | protective tube | 200 | |
| SBWR-4280/640d | 400-800 | M33´2 | 250 | |
Note: The longest thermal resistance of explosion-proof armor shall not exceed 1000mm
□ Structural principle
Explosion proof type and intrinsic safety type temperature transmitters with thermocouples (resistors) adopt an explosion-proof structure, so when the explosive mixed gas inside the shell explodes, the shell will not be damaged, and the resulting heat energy cannot be smoothly diffused and transmitted outward. It can only be slowly transmitted to the outside of the shell through small gaps with sufficient connection length on the shell. At this time, the instantaneous temperature transmitted to the outside of the shell is not enough to ignite the explosive gas outside, that is, it will not cause an explosion. The explosion-proof category of explosion-proof type temperature transmitters with thermocouples (resistors) is dIIBT, Diibt6, or dIICT4, and the explosion-proof category of intrinsic safety type transmitters is ibIIBT4, ibIIBT4 (multi pair). Under strict adherence to usage rules, it has reliable explosion-proof performance
□ Install fixed position
The installation of fixed positions can be divided into three forms: fixed threads, tapered fixed threads, and fixed flanges. The structural dimensions are shown in the table.
| Straight protective tube fixing thread | Used to protect the diameter of the tube (d) | M | h | s | D0 | Flow velocity m | Maximum operating pressure (MPa) |
| 16 | M27´2 | 32 | 32 | 40 | | 10 |
| Conical protective tube fixing thread | | M33´2 | 33 | 36 | 48 | 80 | 30 |
| Fixed flange | 16 | D2 | D1 | D0 | d0 | H | h | | 6.4 |
| 95 | 65 | 45 | 14 | 15 | 2 |
□ Explosion proof and intrinsically safe temperature transmitter with thermocouple (resistor) external structure diagram
| model |
| SBWR-2180/240d. 240i |
| SBWR-4180/240d. 240i |
| SBWR-4170/240d |
| SBWR-2280/240d. 240i |
| SBWR-4280/240d. 240i |
| SBWR-4270/240d |
| SBWZ-2480/24sd. (24si) |
| SBWZ-2470/24sd |
| SBWZ-4480/24sd. (24si) |
| SBWZ-4470/24sd. |
| SBWR-2180/440d. (440i) |
| SBWR-4180/440d. (440i) |
| SBWR-4170/440d |
| SBWR-2280/440d. (440i) |
| SBWR-4280/440d. (440i) |
| SBWR-4270/440d |
| SBWZ-2480/44sd. (44si) |
| SBWZ-2470/44sd |
| SBWZ-4480/44sd. (44si) |
| SBWZ-4470/44sd. |
| SBWR-2180/240kd. (240ki) |
| SBWR-4180/240kd. (240ki) |
| SBWR-4170/240kd |
| SBWR-2280/240kd. (240ki) |
| SBWR-4280/240kd. (240ki) |
| SBWR-4270/240kd |
| SBWZ-2480/24skd. (24ski) |
| SBWZ-2470/24skd |
| SBWZ-4480/24skd. (24ski) |
| SBWZ-4470/24skd. |
| SBWR-2180/440kd. (440ki) |
| SBWR-4180/440kd. (440ki) |
| SBWR-4170/440kd |
| SBWR-2280/440kd. (440ki) |
| SBWR-4280/440kd. (440ki) |
| SBWR-4270/440kd |
| SBWZ-2480/44skd. (44ski) |
| SBWZ-2470/44skd |
| SBWZ-4480/44skd. (44ski) |
| SBWZ-4470/44skd. |
| SBWR-4170/64d |
| SBWR-2180/64d |
| SBWR-4180/64d |
| SBWR-4280/64d |
| SBWR-2280/64d |
| SBWR-4270/64d |
| SBWZ-2470/64d |
| SBWZ-2480/64d |
| SBWZ-4480/64d |
| SBWR-2280/8413kd. (8413ki) |
| SBWR-4280/8413kd. (8413ki) |
| SBWR-4270/8413kd. (8413ki) |
| SBWR-2180/8413kd. (8413ki) |
| SBWR-4180/8413kd. (8413ki) |
| SBWR-4170/8413kd. (8413ki) |
Note: (1) The flange is a flat flange corresponding to the instrument industry standard ZBY02481 and the Ministry of Chemical Industry standard ZB81-59
(2) The parentheses (240i), (24ki), (240ki), and (44ski) are all intrinsic safety specifications,
For example: SBWZ-4480/44ski
□ Explosion proof and intrinsically safe intelligent temperature transmitter with thermocouple (resistor) external structure legend
| model |
| SBWR-2181/440d |
| SBWR-2181/440i |
| SBWR-4181/440d |
| SBWR-4181/440i |
| SBWR-2281/440d |
| SBWR-2281/440i |
| SBWR-4281/440d |
| SBWR-4281/440i |
| SBWZ-2481/44sd |
| SBWZ-2481/44si |
| SBWZ-4481/44sd |
| SBWZ-4481/44si |
| SBWR-2181/240d |
| SBWR-2181/240i |
| SBWR-4181/240d |
| SBWR-4181/240i |
| SBWR-2281/240d |
| SBWR-2281/240i |
| SBWR-4281/240d |
| SBWR-4281/240i |
| SBWZ-2481/24sd |
| SBWZ-2481/24si |
| SBWZ-4481/24sd |
| SBWZ-4481/24si |
| SBWR-2181/440kd |
| SBWR-2181/440ki |
| SBWR-4181/440kd |
| SBWR-4181/440ki |
| SBWR-2281/440ki |
| SBWR-2281/440kd |
| SBWR-4281/440kd |
| SBWR-4281/440ki |
| SBWZ-2481/44skd |
| SBWZ-2481/44ski |
| SBWZ-4481/44skd |
| SBWZ-4481/44ski |
| SBWR-2181/240kd |
| SBWR-2181/240ki |
| SBWR-4181/240kd |
| SBWR-4181/240ki |
| SBWR-2281/240kd |
| SBWR-2281/240ki |
| SBWR-4281/240kd |
| SBWR-4281/240ki |
| SBWZ-2481/24skd |
| SBWZ-2481/24ski |
| SBWZ-4481/24skd |
| SBWZ-4481/24ski |
□ Explosion proof type, intrinsic safety type with thermocouple (resistor) intelligent digital temperature transmitter external structure legend
| model |
| SBWR-2184/440d |
| SBWR-2184/440i |
| SBWR-4184/440d |
| SBWR-4184/440i |
| SBWR-2284/440d |
| SBWR-2284/440i |
| SBWR-4284/440d |
| SBWR-4284/440i |
| SBWZ-2484/44sd |
| SBWZ-2484/44si |
| SBWZ-4484/44sd |
| SBWZ-4484/44si |
| SBWR-2184/240d |
| SBWR-2184/240i |
| SBWR-4184/240d |
| SBWR-4184/240i |
| SBWR-2284/240d |
| SBWR-2284/240i |
| SBWR-4284/240d |
| SBWR-4284/240i |
| SBWZ-2484/24sd |
| SBWZ-2484/24si |
| SBWZ-4484/24sd |
| SBWZ-4484/24si |
| SBWR-2184/440kd |
| SBWR-2184/440ki |
| SBWR-4184/440kd |
| SBWR-4184/440ki |
| SBWR-2284/440kd |
| SBWR-2284/440ki |
| SBWR-4284/440kd |
| SBWR-4284/440ki |
| SBWZ-2484/44skd |
| SBWZ-2484/44ski |
| SBWZ-4484/44skd |
| SBWZ-4484/44ski |
| SBWR-2184/240kd |
| SBWR-2184/240ki |
| SBWR-4184/240kd |
| SBWR-4184/240ki |
| SBWR-2284/240kd |
| SBWR-2284/240ki |
| SBWR-4284/240kd |
| SBWR-4284/240ki |
| SBWZ-2484/24skd |
| SBWZ-2484/24ski |
| SBWZ-4484/24skd |
| SBWZ-4484/24ski |
□ Ordering Notice
When placing an order, please specify
1. Product name and model
2. Explosion proof level
3. Structural form
4. Division number
5. Measurement range
6. The total length and insertion depth (for multiple pairs) must specify the length of each component
7. Name and brand of protective tube material
8. Quantity
Special specification orders must be determined through mutual consultation between both parties
• Intrinsic safety temperature transmitter associated equipment models: MTL728, Z928, LB928