Rotronic DT722 Humidity & Temperature Transmitter
Product Summary:
The DT722 from Rotronic is a durable and accurate humidity and temperature transmitter designed for extreme process conditions, suitable for HVAC, food, pharmaceutical, and paper industries.
Key Features:
Accurate humidity and temperature measurement
Withstands high temperatures up to 150°C
Stainless steel housing for industrial durability
Optional calculated moisture signal output
Long-term stability ±1% RH per year
Fast response time <10 sec (90% step)
4…20 mA output signals for RH and Temp
IP65 rated housing (NEMA 4 equivalent)
M12 5-pin electrical connection
Applications:
HVAC systems
Food and beverage processing
Pharmaceutical environments
Printing and paper production
Harsh process control areas
Product Benefits:
Ideal for extreme temperature conditions
Reduces maintenance with stable, long-term sensor performance
Suitable for sanitary and rugged environments
Easy integration with standard 4-20 mA output
Wide range of compatible accessories for mounting and protection
Q. What are the measurement ranges and accuracies of the DT722?
The DT722 measures relative humidity from 0 to 100 % RH and temperature from –40 °C to +150 °C (–40 °F to +302 °F). At 25 °C (77 °F), humidity accuracy is better than ±2 % RH (5–95 % RH) and temperature accuracy is typically ±0.2 °C (±0.36 °F). Long‑term stability of the RH sensor is ±1 % RH per year.
Q. Which output signals and power supplies does the DT722 support?
Standard output is a 4–20 mA loop (dual‑output versions available for humidity and temperature or calculated moisture). It is powered by 8–32 V DC. Optional variants accept 12–28 VAC or 36 V DC/7–24 VAC (galvanically isolated), and even 240 VAC. An integral loop‑powered display and calculated moisture‑signal output can be ordered as extras.
Q. How often should the DT722 be calibrated and maintained?
Under normal ambient conditions (0–50 °C and 0–70 % RH) an annual calibration ensures ±2 % RH accuracy; for ±5 % accuracy a five‐year interval is acceptable. In harsher environments (high humidity, temperature or airborne chemicals), more frequent calibration is recommended. Rotronic advises using their HygroGen2 humidity generator and accredited service agents for recalibration and maintenance