Urgent! Urgent! Urgent! Urgent! Urgent! Urgent! Urgent! How to select a Rosemount 644 temperature transmitter
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Gentlemen, we need to select a 644 integrated temperature transmitter that is explosion-proof for use in field conditions, with a protection rating of IP65 or higher, equipped with an on-site LCD display, a 4-20mA output signal, and a surge protection unit. Refer to the selection samples. How can I make a choice? Please help everyone.
Reply to 1# wystar: Is explosion protection or intrinsically safe required?
Just select each item according to the selection guidelines, or contact the manufacturer for help – it’s just a phone call away.
Insertion length, total length, process connection type, protective tube material, temperature range, thermocouple or thermal resistor? It’s great to have this clear so it’s easy to choose! :)
Parameters that need to be considered for selection include: range, accuracy, type (thermal resistor, thermocouple), specific explosion protection rating (determined based on the area where the equipment is located and the medium used), depth of temperature probe insertion, material of the temperature well (determined based on the properties of the medium), process connection type (flange, thread), and type of liquid crystal display (LCD, LED). To obtain a vibration report for warm wells, it is also necessary to provide detailed parameters of the medium: viscosity, density, maximum flow rate, highest temperature, maximum pressure, etc. You can simply provide these main parameters to the manufacturer, or choose them based on the selection samples provided by the manufacturer.
First, it is necessary to know the parameters required by the owner; if few parameters are provided, then you need to decide on certain aspects when making the selection. The insertion depth of the 644 transmitter has no relation to that of the sensor. You need to confirm with the owner the installation method, output specifications, explosion protection rating, electrical interfaces, as well as any additional features such as alarm functions. Often, owners don’t want to think about these details; what they need is a supplier who can help solve their problems, rather than just one who offers low prices.