ACI A/20K-I-2.5"-BB : Immersion Temperature Sensor, Welded Thermowell Included, 20K Thermistor, 2.5" Insertion Length, Aluminum NEMA 3R Enclosure

ACI A/20K-I-2.5"-BB : Immersion Temperature Sensor, Welded Thermowell Included, 20K Thermistor, 2.5" Insertion Length, Aluminum NEMA 3R Enclosure

Applications:

• Chilled Water Systems
• Hot Water Systems
• Boilers
• Pumps
• Compressor
• Chillers

The ACI Thermistor Immersion Series features a 1⁄4” diameter stainless steel probe with two, 14 inch 22 AWG Etched Teflon colored lead wires depending on the probe length ordered to differentiate the different sensor types. The sensors in this series are manufactured using ACI’s proven double encapsulation process to eliminate the effects of moisture and to increase the response times using our high quality, thermally conductive epoxy. The immersion sensors include a welded thermowell “-I” version but can be ordered without the welded thermowell “-INW” version. The “INW” version includes a standard 1⁄2” NPS Male process thread to be used with an optional machined thermowell or in an existing thermowell application. Optional NEMA/ IP rated enclosures and NIST certificates are available the back of the product data sheet.

• Sensor Type | Sensor Curve: Thermistor | Non-Linear, NTC (Negative Temperature Coefficient)
• Number Sensing Points | Number Wires: One | 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):
• Stability: Sensor Dependent; Contact ACI for more information on specific sensor
• Response Time (63% Step Change): 10 Seconds nominal
• Power Dissipation Constant: 3 mW/°C except A/1.8K Series: 1 mW/°C | A/10K-E1 Series: 2 mW/°C
• Enclosure Specifications (Temperature, Flammability, NEMA/IP Ratings):
  • "-GD" Enclosure: Galvanized Steel, -40°C to 121°C (-40°F to 250°F), NEMA 1 (IP10)
  • "-PB" Enclosure: ABS Plastic, -30°C to 90°C (-22°F to 194°F), UL94-HB, Plenum Rated
  • "-BB" Enclosure: Aluminum, -40°C to 121°C (-40°F to 250°F), Plenum Rated, NEMA 3R
  • "-4X" Enclosure: Polystyrene Plastic, -40°C to 70°C (-40°F to 158°F), UL94-V2, NEMA 4X (IP 66)
• Storage Temperature Range: -40 to 85°C (-40 to 185°F)
• Operating Humidity Range: 10 to 95% RH, non-condensing
• Probe Diameter | Thermowell Bore Diameter: 0.250" (6.35mm) | 0.260"
• Probe Material | Thermowell Material: 304 Stainless Steel | 304 Series Stainless Steel
• Thermowell Instrument | Process Thread Size: 1⁄2” NPS (National Pipe Straight) Female Thread | 1⁄2” NPT (National Pipe Tapered) Male Thread
• Fitting Material | Flammability Rating: Polyamide 66 (High Performance Nylon 66) | UL94-HB
• Fitting Thread Size: 1⁄2” NPS (National Pipe Straight) Male Thread
• Foam Pad Material | Flammability Rating: Neoprene/EPDM/SBR Polymer | UL94-HBF; FMVSS-302; MIL-R-6130C
• Lead Length | Conductor Size: 14” (35.6 cm) | 22 AWG (0.65mm)
• Lead Wire Insulation | Wire Rating: Etched Teflon (PTFE) Colored Leads | Mil Spec 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