The sensor unit MC2 houses a module with µController, analog output and power supply in addition to the electrochemical sensor element including amplifier.
Exchangeable sensor unit including digital value processing, temperature compensation and
self-control for the continuous monitoring of the ambient air.
The sensor unit MC2 houses a module with µController, analog output and power supply in addition to the electrochemical sensor element including amplifier. The µController calculates a linear 4–0 mA (or 2–10 V) signal out of the measurement signal and also stores all relevant measured values and data of the sensor element.
Calibration is done either by simply replacing the sensor unit or by using the comfortable, integrated calibration routine directly at the system.
APPLICATION
The PolyGard®2 Sensor MC2 is used for the detection of toxic gases or for oxygen monitoring when a typical 4–20
mA (or 2–10 V) signal is required.
| ELECTRICAL | |
| Power supply | 18–29 V DC, reverse-polarity protect.; 18–27 V AC (only for output signal 2–10 V) |
| Power consumption | 23 mA, max. (0.6 VA for 24 V) |
| Analog output signal | Proportional, overload and short-circuit proof, load ≤ 500 Ω for current signal, ≥ 50 kΩ for voltage signal 4–20 mA or 2–10 V = measuring range 3–4 mA or 1.5–2 V = underrange > 20–21.2 mA or 10–10.6 V = overrange 2 mA or 1 V = fault > 21.8 mA or 10.9 V = fault High |
| SENSOR ELEMENT | |
| Gas type and measuring range | See Ordering Information |
| Sensor element | Electrochemical |
| Pressure range | 90–110 kPa or 80–120 kPa (NH3, CO, O2 all NO2 except for 1130-F) |
| Storage temperature range1 | 0 °C to 20 °C (32°F to 68 °F) or 5 °C to 20 °C (41°F to 68 °F) for NH3, CO, NO2, O2 |
| Storage time2 | Ca. 6 months |
| Poisoning | Electrochemical sensors are susceptible to poisoning by organic solvents and silicone vapours. |
| PHYSICAL | |
| Enclosure P (M25) | Polycarbonate UL 94 V2 |
| Colour | RAL 7032 (light grey) |
| Dimensions | (D x H) 24 x 22 mm (0.94 x 0.87 in.) |
| Weight | Ca. 30 g (0.066 lb) |
| Protection class | IP65 (only if mounted in housing type A, D) |
| Mounting | Screw mounting / M25 |
| Wire connection | Screw-type terminal min. 0.25 mm2, max. 1.3 mm2, 3-pin, 24–16 AWG |
| REGULATIONS | |
| Directives (only in connection with the MSR Sensor-Boards) |
EMC directives 2014/30/EU, CE Compliance with: EN 378 EN 45544-1, -3 EN 50104 (for O2) EN 50271 EN 50545 EN 61010-1:2010 ANSI/UL 61010-1 CAN/CSA-C22.2 No. 61010-1 |
• Digital measurement value processing incl. temperature compensation
• Internal function control with integrated hardware watchdog
• Data / measured values in µC of the sensor unit, therefore simple exchange uncalibrated <> calibrated
• High accuracy, selectivity and reliability
• Low zero-point drift
• Long sensor lifetime
• Hardware & software according to SIL compliant development process
• Easy maintenance and calibration by exchange of the sensor unit or by comfortable on-site calibration
• 4–20 mA (or 2–10 V) analog output with selectable signal output for special mode, fault etc.
• Reverse polarity protected, overload and short-circuit proof
• IP65 version
• Housing for integration of the sensor unit (option)
• Display (option)
• Display with 2 open-collector outputs for horn (resettable) and warning lamp (option)
• Conformity to:
– EN 378
– EN 45544-1, -3
– EN 50104 (for O2)
– EN 50271
– EN 50545
– EN 61010-1
– ANSI/UL 61010 1
– CAN/CSA-C22.2 No. 61010-1
• Duct mounting kit (accessory)
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