This new high-temp secondary standards fill the gap between affordable but temperature-limited secondary PRTs and more expensive, highly accurate SPRTs. If you’re using block calibrators, furnaces, or temperature points above normal secondary RTD temperatures (420°C), then these two PRTs are for you. The HR5626 is nominally 100Ω and the HR5628 is nominally 25.5Ω. Both instruments have a temperature range of –200°C to 660°C. They make great working or check standards for calibration work up to the aluminum point.
Using a regular PRT at temperatures above 500°C exposes the platinum to contamination. If the PRT is used as a reference or calibration standard, contamination is a major problem. SPRTs, which are more expensive and delicate, can handle the higher temperatures, but with greater risk to the instrument due to shock, contamination, or mishandling. The HR5626 and HR5628 are designed to reduce the contamination risk through the use of internal protection while not impairing performance. In addition to the right measurement performance and durability, these PRTs are inexpensive and come with a calibration included. The calibration comes complete with constants and a resistance vs. temperature table.
Features
Secondary Standard PRTs: Models HR5626 and HR5628
Range to 660°C
Meets all ITS-90 requirements for resistance ratios
RTPW drift < 20mK after 500 hours at 660°C
SPECIFICATIONS
Temperature Range
–200°C to 661°C
Handle Temp.
0°C to 80°C
RTPW
5626: 100Ω (±1Ω) 5628: 25.5Ω (±0.5Ω)
W(Ga)
≥ 1.11807
Calibration Uncertainty
±0.015°C at 661°C
Stability
5626: ±0.003°C 5628: ±0.002°C
Long-Term Drift
5626: ≤ 0.03°C/500 hours at 661°C 5628: ≤ 0.02°C/500 hours at 661°C
Immersion
At least 5" recommended
Sheath
Inconel™ 600
Lead Wires
4-wire Super-Flex PVC, 22 AGW
Termination
Gold-plated spade lugs
Size
0.25" dia. x 12" or 15" standard, custom lengths available
CAT NO.
MODEL
DEscRIPTION
AVAIL
PRICE
HR562612
5626-12-X
PROBE, 100 Ohm PRT, 12", 661°C
Yes
2,882,520
X = termination. Specify “B” = bare wire, “S” = Gold Spade Lugs, “D” = 5-pin DIN for Tweener Thermometer, “I” Info-Con connector for HR1700 & HR1522 Handheld Thermometer.
HR562615
5626-15-X
PROBE, 100 Ohm PRT, 15", 661°C
Yes
2,882,520
X = termination. Specify “B” = bare wire, “S” = Gold Spade Lugs, “D” = 5-pin DIN for Tweener Thermometer, “I” Info-Con connector for HR1700 & HR1522 Handheld Thermometer.
HR562812
5628-12-X
PROBE, 25.5 Ohm PRT, 12", 661°C
Yes
2,882,520
X = termination. Specify “B” = bare wire, “S” = Gold Spade Lugs, “D” = 5-pin DIN for Tweener Thermometer, “I” Info-Con connector for HR1700 & HR1522 Handheld Thermometer.
HR562815
5628-15-X
PROBE, 25.5 Ohm PRT, 15", 661°C
Yes
2,882,520
X = termination. Specify “B” = bare wire, “S” = Gold Spade Lugs, “D” = 5-pin DIN for Tweener Thermometer, “I” Info-Con connector for HR1700 & HR1522 Handheld Thermometer.
HR2601
2601
OPTIONAL Spare Carry Case 12" PRT FOR Secondary Standard PRT Temperature Reference Probes
Yes
91,800
HR2602
2602
OPTIONAL Spare Carry Case 15" PRT FOR Secondary Standard PRT Temperature Reference Probes
Yes
174,420
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