The 109SS is a rugged, accurate probe that measures soil or water temperature from -40° to +70°C. It is especially suited for harsh, corrosive environments, and can be easily interfaced with our dataloggers.Read More
The 109SS consists of a thermistor encased in a sheath made from grade 316 stainless steel. The rugged stainless-steel sheath protects the thermistor allowing the 109SS to be buried or submerged in harsh, corrosive environments. This probe also has a fast time response.
The 109SS's thermistor can survive temperatures up to 100°C, but the overmolded joint and cable should not be exposed to temperatures hotter than +70°C.
|Operating Temperature Range||-40° to +70°C|
|Maximum Submergence||45.7 m (150 ft) or 434 kPa (63 psi)|
|Temperature Measurement Range||-40° to +70°C|
|Thermistor Temperature Survival Range||-50° to +100°C|
|Overmolded Joint and Cable Temperature Survival Range||-50° to +70°C|
|Steinhart-Hart Equation Error||≤ 0.02°C (-40°)|
|Time Constant in Air||
|Sensor Description||Micro-BetaCHIP Probe 10K3MCD1, 0.5 mm (0.018 in.) diameter, 10 kohm at 25°C|
|Cable Description||0.56 cm (0.22 in.) diameter with Santoprene jacket|
|Cable/Probe Connection||“ATUM” heat shrink, “Macromelt” overmolded joint|
|Stainless-Steel Sheath Diameter||0.16 cm (0.063 in.)|
|Stainless-Steel Sheath Length||5.84 cm (2.3 in.)|
|Overmolded Joint Diameter||1.02 cm (0.40 in.)|
|Overmolded Joint Length||4.24 cm (1.67 in.)|
|Weight||0.1 kg with 3.2 m cable (0.2 lb with 10.5 ft cable)|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
The instruction set for our CR200(X)-series, CR800-series, CR1000, and CR3000 dataloggers contains the Therm109 instruction for measuring the 109SS probe. Programming is more complicated for other data loggers because they must use generic measurement instructions.
The 109SS is suitable for shallow burial only. Placement of the sensor’s cable inside a rugged conduit may be advisable for long cable runs—especially in locations subject to digging, mowing, traffic, use of power tools, or lightning strikes.
The sensor can be submerged to 46 m (150 ft) or 63 psi. Please note that the 109SS is not weighted. Therefore, the installer should either add a weighting system or secure the sensor to a fixed, submerged object, such as a piling.