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Self-Describing Temperature Sensor (SD-TEMP-x) Manual
For use with HOBO® MX1104 and MX1105 data loggers
Specifications
Air/Water/Soil Temperature Probe (SD-TEMP-xx)
Measurement Range -40° to 50°C (-40° to 122°F) in water; -40° to 100°C (-40° to 212°F) in air
Accuracy ±0.15°C from 0° to 50°C (±0.27°F from 32° to 122°F), insert probe 2.3 cm (0.9 inches) minimum; see Plot A
Resolution 0.002° at 25°C (0.003° at 77°F)
Drift <0.1°C (<0.2°F) per year
Response Time in Air 2 minutes typical to 90% in air moving 1 m/s (2.2 mph)
Response Time in Stirred Water 30 seconds typical to 90%
Operating Range Sensor tip and cable immersion in fresh water up to 50°C (122°F) for 1 year
Probe Housing Copper-plated sensor tip
Probe Dimensions 5.1 x 33 mm (0.2 x 1.3 inches)
Cable Length SD-TEMP-01: 0.3 m (1 ft)
Stainless Steel Temperature Probe (SD-TEMP-SS-06)
Measurement range -40° to 100°C (-40° to 212°F)
Accuracy ±0.15°C from 0° to 50°C (±0.27°F from 32° to 122°F), insert probe 5.08 cm (2 inches) minimum; see Plot A
Resolution 0.002° at 25°C (0.003° at 77°F)
Drift <0.1°C (<0.2°F) per year
Response Time in Air 3 minutes typical to 90% in air moving 1 m/s (2.2 mph)
Response Time in Stirred Water 15 seconds typical to 90%
Probe Diameter 3.2 mm ±0.25 mm (0.12 inches ±0.01 inches)
Probe Length 10.2 cm (4 inches)
Probe Housing Food-grade stainless steel (#316 stainless steel)
Cable Length 1.8 m (6 ft)
SD-TEMP-06: 1.8 m (6 ft)
SD-TEMP-20: 5.1 m (20 ft)
SD-TEMP-50: 15.2 m (50 ft)
Note: The stainless steel probe is waterproof, but the handle is not intended for prolonged use in water or
moist environments, especially those with temperatures greater than 30°C (86°F). For more details
contact Onset Computer Corporation or an Onset authorized dealer.
Pipe Temperature Probe (SD-TEMP-P-06)
Measurement Range -40° to 100°C (-40° to 212°F)
Accuracy ±0.15°C from 0° to 50°C (±0.27°F from 32° to 122°F), insert probe 2.3 cm (0.9 inches) minimum; see Plot A
Resolution 0.002° at 25°C (0.003° at 77°F)
Drift <0.1°C (<0.2°F) per year
Response Time in Air 2 minutes typical to 90% in air moving 1 m/s (2.2 mph)
Response Time on a Pipe Typically 2 times faster than the SD-TEMP-xx air/water/soil temperature probe; typically less than 1
Probe Housing Copper-plated sensor tip
Probe Dimensions 0.9 x 5.8 cm (0.38 x 2.3 inches)
Cable Length 1.8 m (6 ft)
23985-B
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minute to 90%
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Self-Describing Temperature Sensors (SD-TEMP-x) Manual
Plot A: Accuracy
(Accuracy outside the 0 to 50°C range is typical)
Using the Sensor with the HOBO MX Analog/Temp/RH/Light (MX1104) or
HOBO MX 4-Channel Analog (MX1105) Data Logger
1. Insert the plug into an analog sensor port on the logger. Turn the sensor plug one-quarter clockwise until it stops.
Using the diagram on the logger housing
shown above as reference, insert the plug
into the analog sensor port.
Turn the plug onequarter clockwise.
The flat part of the plug will be
facing up when properly installed.
2. In HOBOconnect™, connect to the logger and tap . The sensor type will be selected automatically. Set any other logger
settings and tap . See the HOBOconnect User’s Guide at or details on
configuring the logger.
Mounting Guidelines
Air/Water/Soil Temperature Probe (SD-TEMP-xx):
• When measuring air temperature, mount the sensor where there is good air circulation. Leave space between the sensor and
the mounting surface so temperature measurements are not affected by the surface itself.
Stainless Steel Temperature Probe (SD-TEMP-SS-06):
• Items included: 2 tie wraps, 1 #6 screw, thermal compound
• Use a small amount of the enclosed thermal compound between the flat part of the sensor tip and the surface where the
sensor is being deployed to enhance the contact between the two.
• To mount the sensor on a pipe using two tie wraps:
Place thermal compound here
between the sensor and the tube
Tie Wraps
• To mount the sensor on the wall using a #6 screw:
Place thermal compound here
between the sensor and the wall
#6 screw
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