AVT

The AVT is an electronic air velocity and temperature transmitter for air and non-combustible gases with optional relay output

AVT series air velocity transmitters are engineered for building automation in the HVAC/R industry. The AVT measures air velocity and temperature, with field selectable range and output options in a single device. Designed with a duct mount probe and adjustable collar suitable for round or rectangular ducts. The collar allows incremental adjustments to the insertion depth, enabling fine-tuning of measurement results to conform test and balance data.

AVT series devices include:
• Three (3) field selectable measurement ranges for air velocity, selectable via jumper, see Model Summary.
• Separate readings and outputs for air velocity and temperature.
• Output options include: voltage (0–10 V) and current (4–20 mA).

AVT series device offers:
• LCD display
• Field adjustable relay
• NIST-calibration documentation.

The versatility of the AVT series air velocity and temperature transmitters delivers the right product for your automation application.

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Applications

AVT series devices are commonly used in HVAC/R systems for:
• In-duct air flow and velocity monitoring
• In-duct temperature monitoring
• VAV applications

Specifications

Performance

Measurement ranges:
Velocity:
Range 2: 0–400 fpm
Range 10: 0–2,000 fpm
Range 20: 0–4,000 fpm
Temperature: 32−122 °F (0−50 °C)
Accuracy:
Velocity:
Range 2: 0–400 <20 fpm +5 % from reading
Range 10: 0–2,000 fpm <100 fpm +5 % from reading
Range 20: 0–4,000 fpm <200 fpm +5 % from reading
Temperature: <0.9 ºF for v > 100 fpm
Accuracy specifications include: general accuracy, temperature drift, linearity, hysteresis, long term stability, and repetition error.

Technical Specifications

Media compatibility:
Dry air or non-aggressive gases
Measuring units:
fpm and °F
Measuring element:
Temperature: ntc10k
Velocity: Pt1000
Environment:
Operating temperature: 32−122 °F (0−50 °C)
Storage temperature: -4−158 °F (-20−70 °C)
Humidity: 0 to 95 % rH, non condensing
Physical
Case:
Dimensions: 3.54” x 3.74” x 1.4”
(90.0 x 95.0 x 36.0 mm)
Dimensions – Probe:
OD: 0.394 in (10 mm)
Length: 8.26 in (210 mm) from bottom of the cover
Immersion length with flange: Adjustable 2”–7.08”
(50–180 mm)
Weight (Case + Probe):
7.76 oz (220 g)
Mounting:
2 screw holes, 11/64” (4.0 mm)
Materials:
Case: ABS (UL 94 V-0 Approved)
Lid: PC (UL 94 V-1 Approved)
Probe: Stainless Steel
Protection standard:
IP54 / NEMA3
Display
3 1/2 digit LCD display
Size: 1.8” x 0.5” (45.7 x 12.7 mm)
Electrical connections: (2 each)
Power supply & signal out: 4-screw terminal block
12–24 AWG (0.2–1.5 mm2)
Relay out: 3-screw terminal block
12–24 AWG (0.2–1.5 mm2)
Cable entry: (2 each)
Strain relief: M16
Knockout : 0.625” (16 mm)

Electrical

Input: 24 VDC / 24 VAC ± 10 %
Current consumption 35 mA (50 mA with relay) +
40 mA with mA outputs
Output signal 1: (temperature out)
0–10 V (linear to temperature)
L min 1 kΩ
4–20 mA (linear to temperature)
L max 400 Ω
Output signal 2: (velocity out)
0–10 V (linear to fpm)
L min 1 kΩ
4–20 mA (linear to fpm)
L max 400 Ω
Relay Out: 3 screw terminal block
(NC, COM, NO)
12–24 AWG (0.2–1.5 mm2)
Potential free SPDT
250 VAC, 6 A / 30 VDC, 6 A adjustable switching point
and hysteresis

Conformance

Meets requirements for CE marking:
EMC Directive 2014/30/EU
RoHS Directive 2011/65/EU

Meets safety requirements for electrical equipment for measurement, control, and laboratory use:
ETL marking, standard IEC61010-1.

Product is tested and meets the NRTL product approval requirements.

 

Model summary

Measurement ranges:
Velocity f/m
Temperature °F
(field selectable via jumper)		 0–400 / 0–2000 / 0–4000 f/m
32–122 °F		  
Description Model# Part#
All-in-one air velocity transmitter AVT 10082
– with display AVT-D 10083
– with display and relay AVT-D-R 10084