What are Space Qualified Temperature Sensors?

Space Qualified Temperature Sensors are precision sensing devices designed to measure thermal conditions in spacecraft subsystems operating under vacuum, radiation exposure, and extreme temperature variations. These sensors convert temperature-dependent physical properties—such as resistance, voltage, or semiconductor bandgap variation—into electrical signals that can be processed by onboard monitoring and control systems. Common technologies include resistance temperature detectors (RTDs), thermistors, thermocouples, and semiconductor-based sensors, each optimized for stability, repeatability, and radiation tolerance.

Integrated throughout spacecraft structures, propulsion systems, batteries, payloads, and power electronics, temperature sensors play a critical role in thermal management and system protection. Their performance influences heater control loops, thermal modeling accuracy, and fault detection strategies. Space-qualified designs emphasize low drift, robust insulation, vacuum-compatible materials, and mechanically secure wiring to ensure long-term reliability across mission lifetimes.

Key specifications of space qualified temperature sensor:

• Sensor Type: Specifies the underlying sensing technology, such as RTD, thermistor, thermocouple, or semiconductor-based device. Sensor type determines measurement principle, accuracy characteristics, radiation sensitivity, temperature range capability, and interface requirements.
• Sensor Configuration: Refers to the physical and electrical arrangement of the sensing element, including probe style, surface-mount, embedded, or multi-wire configurations. Configuration affects thermal coupling efficiency, response behavior, installation constraints, and redundancy strategies.
• Mass: Indicates the total mass of the sensor assembly including sensing element, encapsulation, leads, and protective housing. Mass considerations are important for distributed sensing networks and for minimizing structural loading in sensitive assemblies.
• Resistance: Represents the nominal electrical resistance of the sensing element at a reference temperature for resistive sensor types. Resistance value influences signal conditioning design, excitation current selection, and measurement resolution.
• Insulation Resistance: Defines the electrical isolation between the sensing element and its housing or surrounding structure. High insulation resistance minimizes leakage currents, improves measurement accuracy, and enhances reliability in high-humidity pre-launch and vacuum conditions.
• Insulation Resistance Voltage: Specifies the test voltage applied when verifying insulation resistance performance. This parameter ensures dielectric integrity under operational and fault conditions, contributing to electrical safety and measurement stability.
• Wiring: Refers to the lead configuration and conductor arrangement used to connect the sensor to monitoring electronics. Wiring type affects measurement accuracy, particularly in resistive sensors where two-wire, three-wire, or four-wire configurations influence compensation for lead resistance and noise immunity.
• Response Time: Indicates the time required for the sensor output to reflect a change in temperature. Response time impacts thermal control loop performance, transient event detection, and the ability to accurately capture rapid temperature fluctuations.

The Largest Database of Space Qualified Temperature Sensors

SatNow has listed Space Qualified Temperature Sensors from the leading manufacturers and made them searchable by specification. You can enter the key parameters and the search tool will scan catalogs from the leading manufacturers to identify products that meet your spec. Once you find Space Qualified Temperature Sensors that meet your requirement, you can view product information, download datasheets or request quotations. Quotation requests will be routed to the manufacturer of the product who will get back to you directly. The quotation will also be routed to distributors of the product in your region.