RKI M2A-CH4(65-2649RK-CH4)独立式防爆变送器(0-100%LEL 0-100%Vol。)

Sensors: Infrared
Measuring Ranges: 0-100% LEL 0-100% Vol.
Resolution : 1% LEL / 1% Vol.
Lower Detectable Limit (LDL): 2% of full scale
Max Current Draw (24VDC): 125 mA with alarm 1 and alarm 2 active and all relays energized
Response Time (T-90): 30 Seconds or less
Life Expectancy: 5 years with normal service 
Accuracy(which ever is greater): ± 5% of reading or 2 % of full scale
Weather Resistant : Patented water repellent sensor coating
Alarm Settings: Two fully programmable alarm set points, increasing / decreasing, latching /
self-resetting, on delays, off delays, normally energized or de-energized
Alarm Indication: Visual LEDs. Alarm 1, Amber; Alarm 2, Red; Fail, Red
Relays: 5 amp form ‘C’ contacts for alarm 1, alarm 2, and fail
Dimensions: Height: 8.5” (215 mm), Width: 5.2” (132 mm), Depth: 4.5” (114 mm)
Display: Alphanumeric OLED display. 8 characters per line;
2 lines for gas concentration readout, plus user-friendly calibration and setup
Enclosure: Explosion proof for Class I, Div 1, Groups B, C, D.
Enclosure Rating: NEMA 4X, explosion proof, watertight, cast aluminum with o-ring seal and epoxy powder coating
Controls: Magnet used for calibration functions. Calibrates without opening the housing.
Internal push-button controls also available for calibration and setup
Operating Environment
Operating Temperature: -40°F to 122°F -40°C to 50°C
Relative Humidity: 5 – 95% RH non-condensing
Location: Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, D.
Operating Voltage: 10 VDC – 30 VDC
Analog: Linear 4-20 mA signal, into 1000 ohms impedance max (24DC), 0 – 500 ohms max (12VDC) corresponding to 0 – full scale
Digital: Modbus RTU output standard, fully configurable, 2-wire RS-485, 1200 to 19.2k baud
Approvals : C UL US
Controllers: Compatible with all RKI Beacon controllers, as well as most DCS / PLC systems: Beacon 110, Beacon 200, Beacon 410, Beacon 800

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