Model 909-25.5 Standard Platinum Resistance Thermometer. Temperature range of -196°C to 670°C
Model 909-100 Standard Platinum Resistance Thermometer. Temperature range of -196°C to 550°C.
The wide range of our Model 909 means that the associated uncertainties are slightly larger than those of
the new models developed from it.
Platinum Resistance Thermometer.
|909-25.5||Standard PRT Thermometer Range -196°C to 670°C|
|909-100||Standard PRT Thermometer Range -196°C to 550°C|
The former is of pure alumina material and all parts have been pre-aged to eliminate
contamination and strain.
All joints are welded to minimize resistance changes. The leads are brought to a handle assembly
where they are connected to a low loss cable, 6 feet long and screened.
Three lengths are available, standard length 480mm, extra length 550mm or maximum length 600mm.
The model 909 is supplied with a calibration certificate giving RTPW and Wga.
For transportation and storage the Model 909 is supplied in its own attractive carrying case.
|Measuring Range||-196°C to 670°C||-196°C to 550°C|
|Nominal Resistance||25.5Ω at 0°C||100Ω|
Maximum Current mA
|Nominal Sensitivity Ω/°C||0.1||0.4|
|Resistance Ratio||Wga > 1.11807 as required by ITS-90|
|Sealed-In Gas||Dry air|
|Internal Leads||4 wire-platinum|
|External Leads||Silver-plated multistrand wires in a
cable terminating in gold-plated terminals.
550mm to order (E)
600mm to order (L)