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DM-701-H₂ Hydrogen Sensor

Brand: Detcon Inc

Detcon Model DM-701-H2 is a non-intrusive “Smart” sensor designed to detect and monitor Hydrogen in air over the range of 0-100% LEL using electrochemical sensor technology. 

The intelligent plug-in, field replaceable cell provides automatic recognition of gas type and range, and features over-sized gold-plated connections that help prevent corrosion. 

The Model 700’s rugged framework includes an intrinsically safe electro-polished 316 stainless steel housing with fully encapsulated electronics and dual layer surge protection. 

This innovative design virtually eliminates sensor failure due to water ingress, corrosion, vibration, and transient spikes. 

A primary feature of the Model 700 is embedded intuitive software that simplifies operator interface by guiding the user through routine calibration, configuration, and fault diagnostic functions using a built-in alpha/numeric display. 

The Model 700 is equipped with standard Analog 4-20 mA, and Modbus™ RS-485 outputs. 

Among its unique features is a wireless option that can be used with Detcon’s SmartWireless® product line. 

Additional integration options include a Remote Alarm Module (RAM), HART, and Foundation Fieldbus. 

Detcon’s toxic gas sensors have a long shelf life and are supported by an industry-leading warranty.

1 - 3 of 3 Part Numbers
967-050590-04P
967-050590-04P
  • Junction Box - No Junction Box
967-050591-04P
967-050591-04P
  • Junction Box - Aluminum
967-050594-04P
967-050594-04P
  • Junction Box - 316 Stainless Steel
1 - 3 of 3 Part Numbers

Specifications

Brand

Accuracy

  • ± 2 % of Full Scale

Ambient Temperature Range

  • -40° to 50° C (-40° to 122° F)

Approvals & Certifications

  • ATEX II 2 G Ex d Ib IIC T4 Gb (Tamb: -40° to 50° C)
  • cCSAus
  • CE
  • CSA Class I, Div. 1, Groups B, C, D (Tamb: -40° to 50° C), Class I, Zone 1, Group IIC
  • EXIDA
  • SIL 2

Cable Length

  • Power/Analog: Max.
  • Serial Output: Max.

Circuit Protection

  • EMI/RFI Protected
  • Miswiring
  • Over-Voltage

Communication

  • Baud Rate: 9,600 bit/sec (9,600, N, 8, 1 Half-Duplex)
  • FOUNDATION Fieldbus
  • HART
  • Modbus RTU
  • RS-485

Consumption

  • < 0.75 W at 30 mA - Normal Operation for Power Consumption
  • 1.2 W at 50 mA - Max.

Current

  • 500 mA at 24 V Typical - Inrush Current

Display

  • 4-Digit LED Display with Gas Concentration

Electrical Connectors

  • 14 AWG (2.5 mm²)
  • 2-Wire Twisted-Pair Shielded Cable - Serial Output
  • 3-Wire Shielded Cable

Enclosure Finish

  • Electro-Polishing

Enclosure, Body Material

  • 316 Stainless Steel

Environmental Protection

  • Corrosion-Proof
  • Explosion-proof
  • IP66
  • NEMA 4X
  • Vibration-Proof
  • Water-Proof

Humidity

  • 5 to 95 % Relative Humidity, Non-Condensing

Input Power

  • 11-30 Vdc

Loop Resistance

  • 1,000 ohms, Max.

Measuring Range

  • 0 to 100 % Lower Explosive Limit (LEL)

Mounting

  • 5.5” (140 mm) Mounting Holes Center to Center

Operating Pressure

  • Atmospheric ± 10 %

Operating Temperature

  • -40° to 40° C (-40° to 104° F)

Output

  • 0 mA - All Fault Diagnostics
  • 0-20 mA - 0 to 100 % of Full Scale
  • 2 mA - In-Calibration
  • 22 mA - Over-Range Condition
  • Linear 4-20 mA DC

Repeatability

  • ± 2 % of Full Scale

Response Time

  • T90 < 60 seconds

RFI/EMI Protection

  • Complies with EN 61000

Sensor, Probe Type

  • 3-Electrode Electrochemical Cell - Sensor Typical
  • Continuous Diffusion / Adsorption - Sensor Typical
  • Plug-In Field Replaceable Intelligent Typical - Sensor Typical

Span Effect

  • < 2% Signal Loss Per Month - Span Drift

Storage Temperature

  • -35° to 55° C (-31° to 131° F)

  • Chemical Plants
  • Food & Beverage
  • Oil & Gas Applications
  • Pulp & Paper
  • Refineries
  • Steel Mills
  • Utilities
  • Wastewater Treatment Plants

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