Flat Surface Thermistor Probe


TSFS‑1™ is a flat surface temperature sensor with stainless steel probe body. It is used to measure surface temperature, such as for solar panels.

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SKU: TSFS-1-006 Category: Tags: ,



Flat Surface Thermistor Probe TSFS-1™ that can be directly attached to flat surfaces. Acrylic foam tape provides a high-strength bond and holds the metallic probe in direct contact with the surface.

The TSFS-1 is double encased and then overmolded. The stainless steep probe is double potted and tightly swaged (formed) around the cable. The swaging forms a liquid-tight mechanical seal and excellent strain relief.

TSFS-1 is suitable for a wide range of temperature measurement applications, including:

– Solar panel (photovoltaic)

– Liquid submersion

– Tank temperature

In addition, when used with Dyacon Control Modules, the temperature value is included in weather reports and can be used to trigger text message alarms.

The Flat Surface Thermistor Probe uses the Dyacon TSSP‑1, which is a precision sensing element in a robust, waterproof package.

Unlike other stainless steel probes, TSSP‑1 is swaged, with the stainless steel enclosure formed around the double-potted sensor element. This construction forms a very durable probe assembly that will not crack or separate in cyclical temperature or vibration environments.

An included cable length of 6 m (20 ft) minimizes the need for cuts and splices.

Manuals & Software


TSFS-1 Data SheetTSSP-1 Instruction Manual

Key Features


TSFS-1™ uses and overmolded Dyacon TSSP-1, a stainless steel thermistor probe. The probe is double potted with thermally conductive epoxy and swaged in a stainless steel probe. The swaged enclosure increases the cable strain relief and sensor sealing. The sensor is designed to neither crack nor come loose from the stainless steel tip, even in high temperature cycling environments.

3M VHB adhesive is used to attach TSFS and keep the metallic probe in direct contact with the surface, while the overmolding minimizes the effect of ambient air temperature.


An interchangeability value of 0.1°C ensures that TSFS-1™ thermistors are field replaceable without further calibration.


TSFS-1 is installed in a Dyacon Control Module, the user can simply enable the thermistor configuration through the menu, and probe measurements will be included in the condition reports.


Resistance10 k ohms @ 25°C
Tolerance+/- 0.1°C (within 0°C to 70°C/ 32°F to 158°F)
Measurement Range-40°C to 105°C (-40°F to 220°F)
Storage Temperature-40°C to 105°C (-40°F to 220°F)
Interchangeability Error+/- 0.1°C (within 0°C to 70°C/ 32°F to 158°F)
Dissipation Constant2 mW/C in still air
Cable to Thermistor ConnectionThermistor leads welded to cable
Submersion Depth>2 m (6 ft)
Cable Length6.1 m (20 ft)
Wire22 AWG, 7 x 30, tin plated, PVC
Cable JacketPVC, gray
Cable Diameter3.8 mm (0.15 in)
Probe Dimensions4.8 mm x 38.1 mm (0.188 in x 1.5 in)
Weight100 g (4 oz)
Probe MaterialsThermoplastic elastomer overmold, swaged in 305 stainless steel probe
Overmold MaterialPolyamide
Adhesive3M VHB 4941 acrylic tape