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Built for rooftop unit and air handler duct monitoring, this duct temperature sensor reads -40 to 239°F (-40 to 115°C) with a 1000 Ω Balco RTD element. In addition, its 8" (20.3 cm) 304 stainless steel probe mounts through a galvanized steel NEMA 1 enclosure. An insulation pad seals the duct and dampens vibration.
Built for rooftop unit and air handler duct monitoring, this duct temperature sensor reads -40 to 239°F (-40 to 115°C) with a 1000 Ω Balco RTD element. In addition, its 8" (20.3 cm) 304 stainless steel probe mounts through a galvanized steel NEMA 1 enclosure. An insulation pad seals the duct and dampens vibration.
The ACI Balco Duct Series features a 1/4" diameter stainless steel probe with two, 22 AWG Etched Teflon colored lead wires to differentiate the different sensor types. The Balco sensors are manufactured using ACI’s proven double encapsulation process to eliminate the effects of moisture on the sensors as well as increased thermal response times from our high quality, thermally conductive epoxy.
The duct style sensor is a single point sensor designed to be used in smaller duct applications and includes an insulation pad for sealing the duct and dampening vibration. For best results, the sensor length should be determined by the width or diameter of your duct such that the tip of the probe is in the approximate center of the duct. Our standard enclosure options include the galvanized junction box “-GD” or plastic duct enclosure with the 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 in the ordering grid.
Applications
| Sensor | Type: Balco RTD Curve: PTC (Positive Temperature Coefficient) Sensing points: One Number of wires: Two (non-polarity sensitive) Output at 70°F (21.1°C): 1000 Ω nominal Lead wire colors: Orange/yellow Operating temperature range: -40 to 239°F (-40 to 115°C) Accuracy: ±1% at 70°F (21.1°C) |
| Configuration | Duct |
| Performance | Temperature coefficient (0 to 100°C): 4618 ppm/°C Stability: ±0.05% after 1000 hours at 302°F (150°C) Response time (63% step change): 8 seconds nominal |
| Probe Material | 304 stainless steel |
| Flange Material | Galvanized 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: Galvanized steel Operating temperature range: -40 to 239°F (-40 to 115°C) Rating: NEMA 1 (IP10) |
| Lead Wire | Length: 14" (35.6 cm) Conductor size: 22 AWG (0.65 mm) Insulation: Etched Teflon (PTFE) colored leads Wire rating: MIL-W-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: 8" (20.3 cm) |
| Weight | 0.68 lbs (0.308 kg) |
| Sensor | Type: Balco RTD Curve: PTC (Positive Temperature Coefficient) Sensing points: One Number of wires: Two (non-polarity sensitive) Output at 70°F (21.1°C): 1000 Ω nominal Lead wire colors: Orange/yellow Operating temperature range: -40 to 239°F (-40 to 115°C) Accuracy: ±1% at 70°F (21.1°C) |
| Configuration | Duct |
| Performance | Temperature coefficient (0 to 100°C): 4618 ppm/°C Stability: ±0.05% after 1000 hours at 302°F (150°C) Response time (63% step change): 8 seconds nominal |
| Probe Material | 304 stainless steel |
| Flange Material | Galvanized 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: Galvanized steel Operating temperature range: -40 to 239°F (-40 to 115°C) Rating: NEMA 1 (IP10) |
| Lead Wire | Length: 14" (35.6 cm) Conductor size: 22 AWG (0.65 mm) Insulation: Etched Teflon (PTFE) colored leads Wire rating: MIL-W-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: 8" (20.3 cm) |
| Weight | 0.68 lbs (0.308 kg) |
