We reserve the right to make alterations and technical data printed. All technical data serves as a guideline and does not guarantee
particular properties to any products.
Name of document: 30910032 Index A
Status: 10/2009
Platinum Resistance Temperature Detector MR 828 and 845
MR series elements are designed for applications where high vibration resistance as well as high temperature stability are
vital. Typical industrial applications include analytical and medical equipment, chemical plants and mechanical equipment.
Small tolerances on diameter allow problem free installation in protective tubes.
The measuring point for the basic value is situated at 8 mm from the end of the sensor body
Type
Toler ance
DIN EN 60751
1996-07
Tolerance
DIN EN 60751
2009-05
Order Number
Diameter D in mm
1 Pt 100 MR 828
Class B F 0.3
32 209 340 2,8
±0, 3
1 Pt 500 MR 828 32 209 341 2,8
±0, 3
1 Pt 1000 MR 828
32 209 342 2,8
±0, 3
2 Pt 100 MR 828 32 209 343 2,8
±0, 3
1 Pt 100 MR 845
32 209 346 4,5
±0, 3
1 Pt 500 MR 845
32 209 347
4,5
±0, 3
1 Pt 1000 MR 845
32 209 348 4,5
±0, 3
2 Pt 100 MR 845
32 209 349 4,5
±0, 3
2 Pt 500 MR 845
32 209 350 4,5
±0, 3
Specification
DIN EN 60751
Nominal resistance 100Ω; 500Ω and 1000Ω at 0°C
Temperature range -70°C to +500°C (continuous operation)
Temporary use to 550°C possible
Tolerance Class B: -70°C up to +500°C
Temperature coefficient TCR = 3850 ppm/K
Leads Pt clad Ni- wire
Lead lengths (L) 6 mm +2 / -1mm
Longterm stability max. R
0
-drift 0.1% after 1000h at 500°C
Vibration resistance according to DIN EN 60751
Environmental conditions unhoused for dry environments only
Insulation resistance > 100 MΩ at 20°C; > 2 MΩ at 500°C
Measuring current 100Ω 0.3 to 1.0mA
500Ω 0.1 to 0.7mA
1000Ω 0.1 to 0.3mA
(self heating has to be considered)
Response time Water (v= 0.4m/s)
Air (v= 2m/s)
MR 828: t
0,5
= 0.9s t
0,9
= 2.7s
t
0,5
= 12.3s t
0,9
= 39.5s
MR 845: t
0,5
= 1.5s t
0,9
= 4.6s
t
0,5
= 24.8s t
0,9
= 78.8s
Self heating MR 828 (Pt 100/500/1000): 0.05 K/mW at 0°C
MR 828 (2 Pt 100/1000): 0.16 K/mW at 0°C
MR 845 (Pt 100/500/1000): 0.04 K/mW at 0°C
MR 845 (2 Pt 100/1000): 0.08 K/mW at 0°C
Packaging blister reel
Note Other tolerances, values of resistance and wire lengths are available
on request.
1901 Route 130
North Brunswick, NJ 08902
Phone 732-940-4400 Fax 732-940-4445
Email info.hst-us@heraeus.com
www.hst-us.com
Heraeus Sensor Technology USA
2 Pt 1000 MR 828
32 209 345 2,8
±0, 3
2 Pt 1000 MR 845
32 209 351 4,5
±0, 3
