The R800 series is a standard platinum resistance thermometer development based on the 1990 International Temperature scale (ITS-90) under the guidance of the National Institute of Metrology, Agency of Industrial Science and Technology.
The R800-3T has significantly improved stability and repeatability by improving the temperature sensor structure from the previous model R800-3L.
Models | Type |
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R800-0 | Standard platinum resistance thermometer for low temperatures (Japan Only) |
R800-2 | Standard platinum resistance thermometer for medium temperature (Japan Only) |
R800-3 | Standard platinum resistance thermometer for high temperatures (Japan Only) |
R800-3T | Low-resistance standard platinum resistance thermometer for high temperatures |
R800-4 | Platinum-cobalt resistance thermometer for cryogenic temperatures (Japan Only) |
Models | R800-0 | R800-2 | R800-3 | R800-3T | R800-4 | |
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Measurement range | 13K to 30℃ | 73K to 661℃ | 0℃~962℃ | 4K to 0℃ | ||
Resistance value (at 0℃) | 25.5Ω±1Ω | 2.55Ω±0.1Ω | 0.25Ω±0.01Ω | 100Ω±4Ω | ||
Measurement current | 1mA | 10mA | 1mA | |||
Temperature characteristic | R(-38.8344℃)/R(0.01℃)≦0.844235 | R(29.7646℃)/R(0.01℃)≧1.11807 | R(29.7646℃)/ R(0.01℃)≧1.11807 and R(961.78℃)/R(0.01℃)≧4.2844 |
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Sensitivity | 0.1Ω/K | 0.01Ω/K | 1mΩ/K | Min 0.09Ω/K (at 12K) Max 0.40Ω/K |
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Filled Gas | Helium gas | Argon/oxygen gas mixture | Helium gas | |||
Connection Leads | 4-wire type Platinum Wire φ0.3mm x35mm |
4-wire type Captive cord 2m Gold-plated terminal |
4-wire type Platinum Wire φ0.3mm x35mm |
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Winding frame | Cruciform Quartz | Cruciform Quartz | ||||
Protective tube | Capsule Shape Platinum sheath φ5×43mm |
Quartz Surface Matte (φ7.0±0.5) ×600mm |
Quartz Surface Matte (φ7.0±0.5) ×700mm |
Capsule Shape Platinum sheath φ5×43mm |
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