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ST-D Thermistor & RTD Sensor
Brand: KeleThe PreCon Model ST-D* Duct Thermistor and RTD Sensor provides precision remote temperature sensing for building automation systems and mechanical equipment room instrumentation.
The active sensing element is a highly stable precision thermistor material or platinum RTD.
The sensing element is sealed with a thermally conductive compound in a 9" (22.8 cm) long 304 stainless steel tube attached to a 4" (10 cm) electrical strap.
The slots in the mounting bracket form mounting ears for direct duct mounting and standard electrical boxes.
The grommet on the tube fitting seals a 9/16" (1.43 cm) insertion hole.
FeaturesSpecifications
Brand
Accuracy
- 0.03° C (± 0.054° F) - RTD Typical 71
- 0.15° C (± 0.27° F) - RTD Typical 81, 85
- 0.2° C (± 0.36° F) - Thermistor
- 0.30° C (± 0.54° F) - RTD Typical 91
- 0.40° C (± 0.72° F) - RTD Typical 63
Approvals & Certifications
- CE
Conduit Connection
- 1/2" NPT Female
Dissipation
- 2.7 mW/°C, Power Needed to Raise the Temperature by 1° C (33.8° F)
Electrical - Free Leads
- 18" (45 cm) Free Leads - for Typical 81 & 71
Electrical Connectors
- 24 AWG
Environmental Protection
- Water-Proof
Insertion 'U' Length
- 9" (23 cm)
Materials of Construction
- RTD: Platinum
Mounting
- Directly to Duct
- Wall Mounted
NACE & NIST
- NIST
NPT Connection
- 1/2" NPT Male
Resistance
- Thermistor: 2.252 to 100 kΩ
RTD Type
- Ni 1,000 ohms - Typical 63
- Pt375 Curve, 1,000 ohms - Typical 91
- Pt385 Curve, 100 ohms - Typical 71, 81, 1,000 ohms - Typical 85
Sensor, Probe Material
- 304 Stainless Steel
Sensor, Probe Type
- RTD
- Thermistor
Stability
- 0.13° C (0.24° F) over 5-Years - Thermistor
Temperature Coefficient
- Negative Temperature Coefficient - Thermistor
- Positive Temperature Coefficient - RTD
Temperature Range
- Thermistor/RTD: -40° to 105° C (-40° to 221° F)