ACI A/20K-RA-18"-GD : Rigid Probe Averaging Temperature Sensor, 20K Thermistor, 18" Probe, Galvanized Enclosure

ACI A/20K-RA-18"-GD : Rigid Probe Averaging Temperature Sensor, 20K Thermistor, 18" Probe, Galvanized Enclosure

Applications:

• Air Handlers
• Roof Top Units
• Mixed Air/Discharge/Supply/Return Air Temperature Monitoring
• Data Centers
• Hospitals

The ACI Thermistor Rigid Averaging Series features a 1⁄4” Diameter stainless steel sensing element with two, 12 inch, 22 AWG Etched Teflon colored lead wires to differentiate the different sensor types. The sensors in this series are manufactured with 4 sensing points in lengths from 12” to 48”. The rigid averaging sensors will provide a better average temperature of the air inside the duct when compared to a single point sensing element. Each of the elements is hermetically sealed to prevent any moisture intrusion and includes an integrated foam pad to properly seal the duct and dampen vibrations when installed. The benefits of using the rigid averaging sensor are that it mounts like a standard single point duct sensor but includes three additional sensing points for better control. The sensor length should be determined by the size of your duct. Our standard enclosures include the galvanized junction box “-GD” or plastic duct enclosure “-PB” with the hinged cover depending on your preference. This series can be ordered with optional NEMA/IP rated weatherproof enclosures as referenced in the ordering grid.

• Sensor Type | Sensor Curve: Thermistor Non-Linear NTC (Negative Temperature Coefficient)
• Number Sensing Points: Four
• Number Wires: Two (Non-Polarity Sensitive)
• Sensor Output @ 25 °C (77 °F) (Lead Wire Colors):
  • A/CP (Type II): 10KΩ nominal | (White/Green)
  • A/AN (Type III): 10KΩ nominal | (White/White)
  • A/20K: 20KΩ nominal | (Brown/Blue)
• Accuracy 0-70°C (32-158°F): +/-0.20°C (+/-0.36°F)
• Stability: Sensor Dependent; ContACI ACI for more information on the sensor in question.
• Response Time (63% Step Change): 10 Seconds nominal
• Power Dissipation Constant: 4 mW/°C except A/1.8K Series = 2 mW; A/100KS Series: 6 mW
• Enclosure Temperature Range:
  • “-GD” Enclosure: -40 to 115°C (-40 to 239°F), Galvanized Steel, NEMA 1 (IP10)
  • “-PB” Enclosure: -30 to 90°C (-22 to 194°F), ABS Plastic, UL94-HB, Plenum Rated
  • “-BB” Enclosure: -40 to 115°C (-40 to 239°F), Aluminum, NEMA 3R (IP14)
  • “-4X” Enclosure: -40 to 70°C (-40 to 158°F), Polystyrene Plastic, NEMA 4X (IP66)
• Storage Temperature Range: -40 to 85°C (-40 to 185°F)
• Operating Humidity Range: 10 to 95% RH, non-condensing
• Probe Material: 304 Stainless Steel
• Probe Diameter: 0.250” (6.35mm)
• Fitting Material | Flammability Rating:  Polyamide 66 (High Performance Nylon) | UL94-HB
• Foam Pad Material | Flammability Rating: Neoprene/EPDM/SBR Polymer | UL94-HBF; FMVSS-302; MIL-R-6130C
• Lead Length | Conductor Size: 12” (30.5cm) | 22 AWG (0.65mm)
• Lead Wire Insulation | Wire Rating:  Etched Teflon (PTFE) Colored Leads | MIL-W-16878/4 (Type E)
• Conductor Material: Silver Plated Copper
• Product Dimensions | Product Weight: See table on back of Product Data sheet
• Agency Approvals:  CE, RoHS2, WEEE