Data sheet

DM-101-H2 (4% Range)

The Detcon DM-101-H2 is a gas detection sensor designed to detect and monitor hydrogen in the air over a range of 0 to 4% by volume using electrochemical sensor technology.

The detection method is by diffusion adsorption. The molecules of air and gas diffuse through a porous membrane in contact with an electrolyte solution that creates a variation of the electrical conductance between a reference electrode and a measurement electrode.

This conductance change is conditioned by internal electronic circuits to provide a linear signal of 4 to 20 milliamperes proportional to the gas concentration.

The sensors in the DM-100 series feature intelligent electronics, a non-intrusive operator interface and a comprehensive fault diagnosis.

The sensor is packaged in a 316 electropolished stainless steel housing equipped with a NP "NPT thread.

The field-replaceable, plug-in sensor cell features large-area gold-plated pins that reduce the effects of corrosion in harsh industrial environments.

The signal conditioning electronics are fully encapsulated in the sensor housing, which adds a high level of durability to the design. The packaging is intrinsically safe.

This innovative design marks the return to a simple, more affordable and durable gas detection sensor without compromising quality.

The DM-100's sensors provide a 4-20 mA current signal powered by a 2-wire loop, equivalent to the sensor's sensing range.

The upper housing options are aluminum and stainless steel (includes a transient protection terminal block).

Additional accessories include wireless communications, a loop-powered digital display, a remote alarm module (RAM), a HART, and an RS-485 power converter.

The standard serial converter is Modbus RTU. Each sensor comes with a splashguard with an integrated calibration port.

Detcon's toxic gas detectors have a long service life and are backed by a first-class warranty.

  • XP intrinsically safe

  • NEMA 4X Weather Resistant and NEMA 7 Explosion Proof

  • Class I, Div. 1, Groups A, B, C and D

  • 2-wire loop

  • Replaceable electrochemical field sensor

  • Non-intrusive magnetic interface

  • Integrated diagnostics

  • Fully encapsulated electronics

  • Electropolished 316SS construction

  • Quick release of the thread (for sensor replacement)

  • Built-in calibration port

Sensor type

Continuous diffusion / adsorption

Electrochemical cell with 3 electrodes

Pluggable Field Type Replaceable

Measuring range

0-4% by volume, Other ranges available

Precision / Repeatability

± 2% FS

Response / compensation time

T90 <60 seconds

Spin Drift

<2% loss of signal per month

Linear outputs

4-20 mA DC