Sourced and supplied across Saudi Arabia
A dial thermometer is a local instrument, read by a person standing next to the plant, and it is specified for that job rather than for a control loop. Two things follow. The first is that it has to be legible from where the operator actually stands, which is what dial size and head style are for — an every-angle head lets the dial be turned to face a walkway after the stem is fitted, and it is the difference between an instrument that gets read on every round and one that gets ignored. The second is the sensing principle. A bimetal thermometer is robust, cheap and slow, and is right for water, oil and air services. A gas-filled or capillary instrument reads faster and can put the dial several metres away from a hot or awkward point, which is how you get a readable gauge on a line inside a furnace enclosure. State the range, where the reader stands, and the stem length.
The more of this you send, the closer the first quotation lands.
| Sensing principle | Bimetal, gas-filled capillary, or filled-system |
|---|---|
| Temperature range | Normal operating point sitting mid-scale where possible |
| Dial size | Set by the distance the operator reads it from |
| Head style | Back entry, bottom entry, or every-angle adjustable |
| Stem length and diameter | Insertion depth needed to reach the process |
| Capillary length | For remote-reading instruments, the run to the dial position |
| Process connection | Thread or flange size, and whether it fits an existing pocket |
| Materials | Stem, case and window materials for the service and the ambient |
| Service | Water, oil, air, steam or a chemical that limits the stem material |
| Sun and vibration | Outdoor dials fade and vibration blurs — state the exposure |
| Scale units | Celsius, Fahrenheit or dual scale |
| Calibration | State if a traceable calibration certificate is required |
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We source to specification. Send your requirement and we will come back with options, lead time and pricing.