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Bolt-On and Embedment RTD Sensors for Space Applications


Stainless-Steel RTD Sensors for Space Applications

The Minco S240890–S240893 family combines platinum RTD sensing with compact stainless-steel cases for bolt-on or embedment installation. These potted sensors are designed for demanding temperature, vibration and vacuum conditions.

  • Pt100 (PD) or Pt1000 (PF), IEC 60751 Class B at 0°C.
  • Operating range: -196 to 200°C (-320.8 to 392°F).
  • Four case styles: mounting block, 1/4-20 bolt, M6 bolt and miniature embedment case.
  • Configurable lead count, insulation and length; optional -RT resistance-temperature testing.

Screening is based on NASA S-311-P-842 Table VII and NASA EEE-INST-002, Section T1, Table 2, Level 2. Program-specific qualification and acceptance testing should be agreed for the application. Contact Mod-Tronic to confirm availability, lead time and mission-specific requirements.

Enter lead lengths of at least 1 inch in the configurator. For shorter or special lead requirements, contact Mod-Tronic.


Select & Configure Model
Base Model #Temperature RangeSensing Element
or
Junction Type
Case MaterialNormally
In Stock
Add to Cart /
Configure Part #
 
S240890-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
Mounting block, 0.50 × 0.375 × 0.188 in.; 0.166 in. hole
Standard screening
InquireConfigurator
S240890-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
Mounting block, 0.50 × 0.375 × 0.188 in.; 0.166 in. hole
With optional -RT testing
InquireConfigurator
S240891-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
1/4-20 × 3/8 in. thread; 7/16 in. hex
Standard screening
InquireConfigurator
S240891-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
1/4-20 × 3/8 in. thread; 7/16 in. hex
With optional -RT testing
InquireConfigurator
S240892-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
M6 × 1 thread, 10 mm long; 10 mm hex
Standard screening
InquireConfigurator
S240892-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
M6 × 1 thread, 10 mm long; 10 mm hex
With optional -RT testing
InquireConfigurator
S240893-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
Style C embedment; 0.300 × Ø0.125 in.
Standard screening
InquireConfigurator
S240893-196 to 200°C
(-320.8 to 392°F)
Select in ConfiguratorStainless steel
Style C embedment; 0.300 × Ø0.125 in.
With optional -RT testing
InquireConfigurator
Temperature Range:

-196 to 200°C (-320.8 to 392°F).

Case Material:

Stainless steel; mounting block, imperial or metric bolt, and Style C embedment cases.

Leadwires:

Y: 2 leads, 24 AWG; Z: 3 leads, 26 AWG; X: 4 leads, 30 AWG, per the ordering table.

Environmental:

Designed for space temperature, vibration and vacuum conditions. Meets NASA low-outgassing requirements per the datasheet.

Accuracy:

Class B at 0°C. Below -50°C, see the datasheet’s special tolerance basis; stated tolerance at -196°C: ±2.56°C.

Sensing Element:

PD: Pt100 or PF: Pt1000 at 0°C; IEC 60751 Class B; TCR 0.003851 Ω/Ω/°C from 0 to 100°C.

Excitation:

1 mA maximum excitation current recommended.

Insulation Type:

T: PTFE; K: polyimide; S: stainless-steel braid over PTFE; E: ETFE.

Agency Approvals:

Screening based on NASA S-311-P-842 Table VII and NASA EEE-INST-002 Section T1, Table 2, Level 2; confirm mission-specific qualification.

Insulation resistance:

1,000 MΩ minimum at 500 VDC during screening per MIL-STD-202 Method 301.


Case Styles and Ordering

  • S240890: 0.50 × 0.375 × 0.188 in. mounting block with 0.166 in. hole (12.7 × 9.5 × 4.8 mm; 4.2 mm hole).
  • S240891: 1/4-20 thread, 3/8 in. long, with 7/16 in. hex head.
  • S240892: M6 × 1 thread, 10 mm long, with 10 mm hex.
  • S240893: Style C embedment case, 0.300 in. long × 0.125 in. diameter (7.6 × 3.2 mm).

Choose a standard-screening row or a row with optional -RT testing, then select the element, lead configuration, insulation and lead length in the configurator. Example: S240890PDZT40; adding resistance-temperature testing gives S240890PDZT40-RT.

The ordering table specifies Y = 2 leads (24 AWG), Z = 3 leads (26 AWG), and X = 4 leads (30 AWG). These gauge-specific ordering entries take precedence over the datasheet’s general wiring summary. T = PTFE; K = polyimide; S = stainless-steel braid over PTFE; E = ETFE.

Optional Resistance-Temperature Testing

The -RT suffix adds testing at -196, -50, 0, 100 and 200°C against the resistance/temperature characteristics table. Other customized screening and qualification plans are by inquiry and have no additional published ordering code.

Accuracy at Cryogenic Temperatures

IEC 60751 Class B (F 0.3) does not define thin-film tolerance below -50°C. The datasheet’s -196°C tolerance is ±2.56°C, based on twice the wire-wound tolerance at the minimum temperature. See the attached datasheet for the complete resistance and tolerance table.


Mod Tronic Instruments Limited
1 Delta Park Blvd #12
Brampton, ON L6T 5G1
Phone: 905-457-6322 or 1-800-794-5883
Fax: 905-457-4716 or 1-800-830-7122
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