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Oxygen Sensor Model DM-700-O₂
Brand: Detcon IncModel DM-700-O₂ is a non-intrusive “Smart” sensor designed to detect and monitor Oxygen in air over the range of 0-25% by volume using electrochemical sensor technology.
The plug-in, field replaceable sensor cell is temperature compensated 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), and HART. Detcon’s oxygen sensors have a long shelf life and are supported by an industry-leading warranty.
Features- Failsafe User-Friendly Interface
- LED Display (With Antiglare Cover)
- Full Text Display Method
- Non-intrusive Interface
- Auto Zero/Auto Span
- Pre-emptive Fault Diagnostics Environmentally Bulletproof
- Electropolished 316SS Construction
- 100% Epoxy Encapsulated Circuitry
- Bulletproof I/O Protection
- Water-Proof, Corrosion-Proof, Vibration-Proof Modular and Serviceable
- Modular Design
- Plug and Play Components
- Quick Thread Release (For Sensor Replacement)
- Integral Calibration Port
Specifications
Brand
Sensor Type
- Continuous diffusion/adsorption
- 2-electrode electrochemical cell
- Plug-in field replaceable Intelligent Type
Sensor Life
- 2-1/2 to 3 years Typical
Measurement Range
- 0-25 % Oxygen by volume
Accuracy/Repeatability
- ± 1 % Full Scale
Response/Clearing Time
- T90 ≤ 10 seconds
Span Drift
- < 5 % of signal per year (in first two years)
Outputs
- Linear 4-20 mA DC
- RS-485 MODBUS-RTU
Electrical Classification
- Explosion-proof
- CSA and US (NRTL)
- Class I, Div. 1, Groups B, C, D (Tamb = -40° to +50° C)
- Class I, Zone 1, Group IIC
- ATEX
- II 2 G Ex d ib IIB + H₂ T4 Gb (Tamb = -40° to +50° C)
Ingress Protection
- NEMA 4X, IP66
Safety Approvals
- cCSAusa
- ATEX
- CE Marking
- SIL 2 Certified to IEC 61508
Warranty
- Plug-in Cell - 2 years; Transmitter - 2 Years
Operating Temperature Range
- -40° to +122° F; -40° to +50° C
Storage Temperature Range
- -40° to +122° F; -40° to +50° C
Operating Humidity Range
- 0-99 % RH, Non-Condensing
Operating Pressure Range
- Atmospheric ± 10 %
Dimensions
- 7" H x 2.2" Dia.; 178 mmH x 65 mm Dia. (sensor assembly only)
- 11" H x 6.1" W x 3.75" D; 280 mmH x 155 mmW x 96 mmD (with junction box)
- Mounting holes (J-box) 5.5"; 140 mm center to center
Weight
- 2 lb, 0.907 kg (Sensor only)
- 6 lb, 2.72 kg (with Aluminum J-Box)
- 9 lb, 4.08 kg (with Stainless Steel J-Box)
Power Input
- 11-30 VDC
Power Consumption
- Normal operation = 30 mA (< 0.75 watt)
- Maximum = 50 mA (1.2 watts)
Inrush Current
- 1.67A @ 24 V
RFI/EMI Protection
- Complies with EN 50270
Analog Output
- Linear 4-20 mA DC (1,000 ohms max loop load @ 24 Vdc)
- 0 mA - All Fault Diagnostics
- 2 mA In-Calibration
- 4-20 mA 0-100 % Full Scale
- 22 mA Over-range condition
Serial RS-485 Output
- RS-485 Modbus RTU
Baud Rate
- 9600 BPS (9600,N,8,1 Half Duplex)
Status Indicators
- 4-digit LED display with gas concentration
- Full-script menu prompts for AutoSpan,
- Set-up Options, and Fault Reporting
Faults Monitored
- Faults Monitored Loop, Input Voltage, Missing Sensor, Zero, Processor, Memory, Calibration
Cable Requirements
- Power/Analog 3-wire shielded cable Maximum distance is 13,300 ft with 14 AWG
- Serial Output 2-wire twisted-pair shielded cable specifically for use with RS-485 installations Maximum distance is 4,000 ft to last sensor
I/O Protection
- Over-voltage, Miswiring, EMI/RFI Immunity
- Petrochemical
- Refineries
- Chemical plants
- Confined Space Monitoring
- Analyzer Shelters
- Wastewater treatment plants
- Wet wells-dry wells
- Pulp and paper
- Food and beverage
- Utilities