DPT-21 Programmable 2- wire dewpoint transmitter (-100..+20Cdp)

Product description

The DPT-21 is a transducer that generates a 4 … 20 mA current signal proportional to the humidity of the measured gas. The measuring element is a ceramic capacitive sensor with a wide measuring range and fast response time. The transmitter is calibrated and configured at the factory.

Technical data


Dewpoint measurement range -100÷20 °Cdp, -148÷68 °Fdp*, 0.5÷23000 ppm(v)
Measurement accuracy ±2 °Cdp
Thermal drift compensated across operating temperature range
Conversion range 10÷100 % of measurement range – programmable
Response time T95 1 min (dry to wet)
Output signal 4÷20 mA or 20÷4 mA – programmable
Linear region of output signal 3.8÷20.5 mA
Output signal delay after power on ca 5 s
Sensor failure indication 23 mA or 3,5 mA – programmable
Power supply Vs 8÷36 V DC / 24 mA (from current loop)
Maximal load resistance (Vs[V] – 8) / 0,024
Operating temperature range -40÷60 °C
Maximal operating pressure 40 MPa
Housing material / filte stainless steel / 5 µm stainless steel sintered guard
Ingress protection IP65
Process connection external thread 5/8″-18 UNF
Dimensions with connector (diameter x length) / weight 31 x 129 mm / 150 g
Accessories (ordered separately interface IF-2013U-DPT
process connection adapter G1/2″-DPT
sampling block SB-DPT

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Delivery time is 2-7 business days