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ST-A Thermistor & RTD Sensor
Brand: Kele
The Precon ST-A* Series All-Purpose Thermistor and RTD Sensors provide precision remote temperature sensing for building automation systems and mechanical equipment room instrumentation.
The active sensing element is made of a highly stable precision thermistor material or platinum RTDs.
The ST-A* Series sensors are rugged, point-sensitive waterproof sensors featuring a 9" (22.8 cm) 304 stainless steel probe and brass fitting.
The brass fitting has a 1/2" NPT male thread.
The sensors are supplied with two 1/2" locknuts for easy installation in handy boxes (or other enclosures with 1/2" knockouts).
Features- Lifetime warranty
- Wide selection of thermistor and RTD curves
- Tip sensitive for precise temperature response
- Adaptable with many options
- All metal construction with 304 stainless steel probe
- Easy to mount to duct, wall, or back box
- Waterproof probe
Specifications
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
Applications
- Building Automation Systems & Mechanical Equipment Room Instrumentation
Approvals & Certifications
- CE
Approvals & Certifications
- Compliance / Conformance
Dissipation
- Heat: 2.7 mW/°C (Power Needed to Raise the Temperature by 1° C (1.8° F))
Electrical - Free Leads
- 18" (45 cm) Free Leads - for Typical 71, 81
- 8 feet (2.4 m) & 25 ft (7.6 m) 24 AWG Wire Leads
Element
- Sensing Element: Platinum RTDs
Enclosure, Body Material
- Metal Handy Box
Insertion 'U' Length
- 1" to 108" (2.54 to 274.3 cm) - Probe Insertion Length
Mounting
- Directly to Duct
- Immersion Mount: Well
- Plenum
- Wall Mounted
NACE & NIST
- NIST
NPT Connection
- 1/2" NPT Male
Process Fitting Details
- Brass
Resistance
- 2.252 to 100 kΩ - Thermistor
RTD Type
- Typical 63: Ni1000
- Typical 71, 81 & 85: 100 & 1,000 ohms Pt385 Curve
- Typical 91: 1,000 ohms Pt375 Curve
Sensor, Probe Connection
- 3-Wire
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
- -40° to 105° C (-40° to 221° F) - Thermistor/RTD