Engineered for rooftop unit and air handler duct monitoring, this duct temperature sensor reads -40 to 302°F (-40 to 150°C) with a 10 kΩ type III NTC thermistor. In addition, its 4" (10.2 cm) 304 stainless steel probe mounts through a plenum-rated ABS plastic enclosure. An insulation pad seals the duct and dampens vibration.
Engineered for rooftop unit and air handler duct monitoring, this duct temperature sensor reads -40 to 302°F (-40 to 150°C) with a 10 kΩ type III NTC thermistor. In addition, its 4" (10.2 cm) 304 stainless steel probe mounts through a plenum-rated ABS plastic enclosure. An insulation pad seals the duct and dampens vibration.
The ACI Thermistor Duct Series features a stainless steel probe with two, 22 AWG Etched Teflon colored lead wires to differentiate the different sensor types. The sensors in this series are manufactured using ACI’s proved double encapsulation process to eliminate the effects of moisture on the sensors and increased response times from our high quality, thermally conductive epoxy. The duct sensor is designed to be used in smaller duct applications and includes an insulation pad for sealing your duct and dampening vibration.
The sensor length should be determined by the width or diameter of your duct such that the tip of the probe reaches the approximate center of the duct. Our standard enclosure options are the galvanized enclosure “-GD” or plastic duct enclosure with hinged cover “-PB”.
On larger ducts, you may want to refer to our Rigid or Bendable Copper Averaging sensor for increased sensing points and better temperature control. This series can be ordered with optional NEMA/IP rated weather proof enclosures and NIST certificates as referenced on the back of the product data sheet.
Applications
| Sensor | Type: Thermistor Curve: Non-linear, NTC (Negative Temperature Coefficient) Sensing points: One Number of wires: Two (non-polarity sensitive) Output at 77°F (25°C): 10 kΩ nominal (Type III) Lead wire colors: White/white Operating temperature range: -40 to 302°F (-40 to 150°C) Accuracy: ±0.36°F (±0.2°C), from 32 to 158°F (0 to 70°C) |
| Configuration | Duct |
| Performance | 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 |
| Probe Material | 304 stainless steel |
| Fitting | Material: Polyamide 66 (high performance nylon) Flammability rating: UL94-HB |
| Foam Pad | Material: Neoprene/EPDM/SBR polymer Flammability rating: UL94-HBF; FMVSS-302; MIL-R-6130C |
| Enclosure | Material: ABS plastic Operating temperature range: -22 to 194°F (-30 to 90°C) Flammability rating: UL94-HB Rating: Plenum rated |
| Lead Wire | Length: 14" (35.6 cm) Conductor size: 22 AWG (0.65 mm) Insulation: Etched Teflon (PTFE) colored leads Wire rating: Mil Spec 16878/4 Type E Conductor material: Silver plated copper |
| Environmental Conditions | Storage temperature range: -40 to 185°F (-40 to 85°C) Operating humidity range: 10 to 95% RH, non-condensing |
| Agency Approvals | CE, RoHS2, WEEE |
| Dimensions | Probe diameter: 0.25" (6.35 mm) Probe length: 4" (10.2 cm) |
| Weight | 0.24 lbs (0.109 kg) |
| Sensor | Type: Thermistor Curve: Non-linear, NTC (Negative Temperature Coefficient) Sensing points: One Number of wires: Two (non-polarity sensitive) Output at 77°F (25°C): 10 kΩ nominal (Type III) Lead wire colors: White/white Operating temperature range: -40 to 302°F (-40 to 150°C) Accuracy: ±0.36°F (±0.2°C), from 32 to 158°F (0 to 70°C) |
| Configuration | Duct |
| Performance | 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 |
| Probe Material | 304 stainless steel |
| Fitting | Material: Polyamide 66 (high performance nylon) Flammability rating: UL94-HB |
| Foam Pad | Material: Neoprene/EPDM/SBR polymer Flammability rating: UL94-HBF; FMVSS-302; MIL-R-6130C |
| Enclosure | Material: ABS plastic Operating temperature range: -22 to 194°F (-30 to 90°C) Flammability rating: UL94-HB Rating: Plenum rated |
| Lead Wire | Length: 14" (35.6 cm) Conductor size: 22 AWG (0.65 mm) Insulation: Etched Teflon (PTFE) colored leads Wire rating: Mil Spec 16878/4 Type E Conductor material: Silver plated copper |
| Environmental Conditions | Storage temperature range: -40 to 185°F (-40 to 85°C) Operating humidity range: 10 to 95% RH, non-condensing |
| Agency Approvals | CE, RoHS2, WEEE |
| Dimensions | Probe diameter: 0.25" (6.35 mm) Probe length: 4" (10.2 cm) |
| Weight | 0.24 lbs (0.109 kg) |
