Michell Instruments DT722 Specifications

Humidity and Dew-Point Instruments

DT722

Duct Mount Rugged Relative Humidity and Temperature Transmitter

The DT722 is a rugged industrial relative humidity and temperature transmitter designed for
process applications where accurate, stable measurement and control of humidity and temperature
is required.

Highlights

• Designed for accurate measurement in a harsh
environment

• Can withstand temperatures up to 150°C (300°F)

• Stainless steel housing

• Calculated moisture signal output, optional

• Integral loop powered display – optional

• 0 to 100% RH / -40 to +150°C operating ranges

• Long term stability: ±1% RH over 12 months

• M12 fast connector and cable gland

Applications

• HVAC

• Agricultural

• Environmental

www.michell.com

Humidity and Dew-Point Instruments

DT722

Technical Specifi cations

Performance

Measurement range (RH) 0–100% RH
Measurement range (T) -40 to +150°C (-40 to +302°F)
Accuracy @ 25°C (77°F)

humidity
Accuracy @ 25°C (77°F)

temperature
Stability – RH Sensor ±1% RH/year
Response time – RH Sensor <10 sec typical (for 90% of the step

Electrical Specifi cations

Output signal 4–20 mA
Supply voltage 8 to 32 V DC
Supply voltage infl uence ±0.01% RH/V typical

Operating Specifi cations

Operating humidity
Probe, housing, storage 10 to 95% RH (non-condensing)

Operating temperature

Probe
Housing
Storage

Mechanical Specifi cations

Ingress protection IP65 (NEMA 4 level)
Housing material Stainless steel
Weight 200mm / 800g (7.87” / 28.22oz)

Electrical connections 5 pin, M12

<±2% RH (5-95% RH)

±0.2°C (±0.36°F) typical

change)

-40 to +150°C (-40 to +302°F)

-20 to +70°C (-4 to +158°F)

-30 to +75°C (-22 to +167°F)

300mm / 900g (11.81” / 31.75oz)
500mm / 1040g (19.69” / 36.68oz)
900mm / 1412g (35.43” / 49.80oz)

Dimensions

Electrical Connections

Connections

1

Cable Pin

White Pin 1 SUPPLY + 8 to 32 V DC

Yellow Pin 2 Output 2 = Temp 4-20 mA (max 500 Ω)

Brown Pin 3 Not connected (for calibration only)

Green Pin 4 Output 1 = RH 4-20 mA (max 500 Ω)

Pin 5 Not connected (for calibration only)

Note: Both RH and T need to be connected in order for the T output to work

Note: Even though the DT722 has a 5
pin connector, the standard connection
cable (A000031) only has four pins/wires.
However, only three pins (1, 2 and 4) are
needed to connect the DT722.

Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788

Tel: [phone], Email: [e-mail], Web: www.michell.com/us

Michell Instruments adopts a continuous development programme which sometimes necessitates specifi cation changes without notice.
Issue no: DT722_97191_V4.1_US_0618

© Michell Instruments 2018

2

5

4

3

Electrical Connections