1) 절대온도 0.01℃ 발생장치임
2) 절대온도 0.01℃를 발생하기 위해선 물의 삼중점 을 구현해야 하며 잘 구현된 셀은 보관함에
얼음과 함께 보관되어야 절대온도 0.01℃를 유지 할수 있음.
따라서 보관함은 대형 진공유리 그릇을 사용해야 보온이 잘 되고 수일간 사용할 수 있음
Features
Best cell uncertainties commercially available
Every ITS-90 fixed point available from mercury to copper
Plateaus last days (gallium for weeks and TPW for months)
Manufactured and tested by Hart’s primary standards scientists
Specifications
Model
Fixed Point
Style
Assigned Value (°C)
Outside Diameter
Inside Diameter
Total Outside Cell Height
Depth‡
Cell Uncertainty (mK, k=2)
Certification (mK, k=2)†
5900
Mercury
Stainless Steel
–38.8344
31 mm
8.2 mm
470 mm
200 mm
0.2
0.25
5903
Gallium
Traditional Quartz Glass
29.7646
42 mm
8 mm
300 mm
150 mm
0.08
0.1
5904
Indium
Traditional Quartz Glass
156.5985
48 mm
8 mm
285 mm
195 mm
0.7
0.7
5905
Tin
Traditional Quartz Glass
231.928
48 mm
8 mm
285 mm
195 mm
0.5
0.8
5906
Zinc
Traditional Quartz Glass
419.527
48 mm
8 mm
285 mm
195 mm
0.9
1.0
5907
Aluminum
Traditional Quartz Glass
660.323
48 mm
8 mm
285 mm
195 mm
1.3
1.8
5908
Silver
Traditional Quartz Glass
961.78
48 mm
8 mm
285 mm
195 mm
2.4
4.5
5909
Copper
Traditional Quartz Glass
1084.62
48 mm
8 mm
285 mm
195 mm
10.1
12.0
5910
Gold
Traditional Quartz Glass
1064.18
48 mm
8 mm
285 mm
195 mm
2.5
4.5
5924
Indium
Open Quartz Glass
156.5985
50 mm
8 mm
596 mm
195 mm
0.7
0.7
5925
Tin
Open Quartz Glass
231.928
50 mm
8 mm
596 mm
195 mm
0.5
0.8
5926
Zinc
Open Quartz Glass
419.527
50 mm
8 mm
596 mm
195 mm
0.9
1.0
5927A-L
Aluminum
Open Quartz Glass (long)
660.323
50 mm
8 mm
696 mm
195 mm
1.3
1.8
5927A-S
Aluminum
Open Quartz Glass (short)
660.323
50 mm
8 mm
596 mm
195 mm
1.3
1.8
5928
Silver
Open Quartz Glass
961.78
50 mm
8 mm
696 mm
195 mm
2.4
4.5
5929
Copper
Open Quartz Glass
1084.62
50 mm
8 mm
696 mm
195 mm
10
12.0
5943
Gallium
Stainless Steel
29.7646
38.1 mm
8.2 mm
250 mm
168 mm
0.1
0.1
†Certifications at lower uncertainties are available for national laboratories. ‡Depth is measured from the bottom of the thermometer well to the top of the pure reference material.