Differences and relationships between nominal pressure, operating pressure, and design pressure

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The SBW series thermocouples and thermal resistance temperature transmitters are field-installable temperature transmitter units in the DDZ-S series of instruments. It uses a two-wire transmission method (two wires for power supply input, with a common transmission line for signal output). Converts thermocouple and thermal resistance signals into 4-20mA output signals that are linear with the input signal or with the temperature signal. The transmitter can be installed in the terminal box of thermocouples or thermal resistors, forming an integrated structure with them. As a new generation of temperature measurement instrument, it can be widely applied in various industrial sectors such as metallurgy, petroleum, chemicals, power generation, light industry, textiles, food processing, defense, and scientific research. 1. It features a silicone rubber sealing structure, making it shock-resistant and moisture-resistant, and suitable for installation in harsh field conditions. 2. It is installed on-site in the wiring boxes of thermocouples and thermal resistors, delivering a 4-20mA signal directly; this not only eliminates the need for expensive compensation wires but also enhances the signal’s resistance to interference during long-distance transmission. 3. The transmitter features an open-circuit indication at the input terminal, and the thermocouple temperature transmitter has an automatic cold-junction temperature compensation function. 4. High precision, low power consumption, wide operating temperature range, and stable and reliable performance. 5. Wide range of applications. It can form an integrated on-site installation structure with thermocouples and thermal resistors, or it can be installed as a functional module in testing equipment. Key technical specifications ☆ Input: Thermocouples K-type, E-type, B-type, S-type, T-type, J-type, N-type; Thermal resistors Pt100, Cu100, Cu50 (three-wire or four-wire system). ☆ Output: Outputs a 4-20mA DC signal within the range. Linear with the millivolt signal from the thermocouple input ； It is linear with the resistance signal input from the thermal resistor. or be linear with the temperature signal. The temperature transmitter features isolation between the input and output; with an isolation voltage of 0.5 KV, it offers improved resistance to common-mode interference, making it more suitable for use in computer networks. ☆ Basic error: ±0.5%F.S☆ Transmission method: two-wire system☆ Display type: (digital display) LCD with four-digit display; when the thermocouple is open-circuited, the E...... symbol is displayed and the output exceeds 20mA. 6、☆ Operating power supply: The operating voltage for the transmitter ranges from a minimum of 12V to a maximum of 35V, with a rated operating voltage of 24V. 7、☆ Normal operating environment: 8、a) Ambient temperature: -25℃~80℃ (standard type) 9、-20℃~70℃ (digital display type) 10、b) Relative humidity: 5%~95% 11、c) Mechanical vibration: f≤50Hz, amplitude