4-20 mA & RS-485 Modbus Gas Detection Transmitters
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Universal Transmitter
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2 or 3-Wire Models
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Optional I. S. Installation
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Transportable Calibration
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Automatic Sensor Recognition
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Menu Driven Non-intrusive Interface
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Displays Gas Name, Concentration & Units
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3 Alarm relays standard with RS-485 Model
The ‘original’ smart sensor gas monitor, SensAlert® was the first intelligent sensor fixed monitor to be offered on the market. Advanced components and rigorous ergonomic design are combined to provide significantly improved reliability with streamlined maintenance. The menu driven non-intrusive user interface provides fast access to all transmitter functions in most hazardous classified environments.
SensAlert transmitters automatically recognize all SensAlert® sensors, displaying the gas name, measuring units, and value. Linearization and temperature compensation are performed from data stored in sensor non-volatile memory. This provides an accurate, drift-free measurement over a wide range of environmental conditions.
SensAlert 2-wire and 3-wire 4-20mA models are offered as well as RS 485(Modbus RTU) communications, three enclosure styles and Intrinsically Safe installation. Accessories, including remote sensor extension, duct mount, and sample draw equipment, complete this exceptional product line.
SensAlert Transmitters have a non-intrusive menu driven interface designed for efficient set-up and maintenance. Applying a known zero gas to the sensor and touching ZERO with the magnet wand sets the zero. Touching the SPAN control with the magnet displays “Enter Value” and prompts the entry of the calibration gas concentration. The transmitter performs the span in 30-60 seconds. “Cal OK” or “Cal Fail” is displayed and the new calibration data is written into the sensors non-volatile memory.
Click a model below to see specifications
SensAlert 4-20mA Transmitter
Sensors
Types: Toxic, Oxygen and Combustible
Technology: Catalytic bead and electrochemical
Electrical
Power: 15-30 VDC, 20-115 mA
EMI/RFI: EN 50082-1, 50022 Compliant IEC 801-2, 801-3, & 801-4 Compliant
Outputs:
All Models: 2 or 3-wire 4-20 mA
User Interface
Display: 2-line alphanumeric LCD
Screens: Displays Gas Name, Gas Value,& Measuring Units.
Controls: ZERO and SPAN
Interface: Magnetic switches
Environmental
Temperature: -13° to 122°F (-25° to 45°C) Subject to sensor temp limits
Humidity: 5-95 %RH, non-condensing
Enclosure Options
NEMA 4X: Polycarbonate
Dimensions: 5.3 W by 8.7 H by 3.3 D in (13.5 W by 22 H by 8.5 D cm)
Weight: 1.9 lbs. (0.8 kg)
HD (Div 2): Cast Aluminum (Copper-free)
HD (I.S.): Cast Aluminum (Copper-free)
Dimensions: 6.1 W by 10.1 H by 4.9 D in (15.5 W by 25.6 H by 12.4 D cm)
Weight: 4.2 lbs. (1.9 kg)
Explosion-Proof: Cast Aluminum (Copper-free)
Dimensions: 6.1 W by 10.0 H by 4.9 D in (15.5 W by 25.5 H by 12.4 D cm)
Weight: 4.9 lbs. (2.2 kg)
Approval Ratings
UL: Class I, Div 1, Groups B, C, & D; Class I, Div 2, Groups A, B, C, & D; Class II, Div 2, Groups F,G
Intrinsic Safety: NEMA 4X and HD (I.S.) models (without relay) are approved intrinsically safe (UL 913) for Class I, Div 1, Groups A, B, C, & D; Class II, Div 1, Groups E,F,G, when installed with listed Sensidyne Barrier (part number 7013263).
CE Mark: EN55011 & EN61000
SensAlert Modbus (RS-485) Transmitter
Sensors
Types: Toxic, Oxygen and Combustible
Technology: Catalytic bead and electrochemical
Electrical
Power: 15-30 VDC, 20-115 mA
EMI/RFI: EN 50082-1, 50022 Compliant IEC 801-2, 801-3, & 801-4 Compliant
Outputs:
All Models: 3-wire 4-20 mA & Modbus (RS-485)
Relays: 3 Form C, 5 Amp
User Interface
Display: 2-line alphanumeric LCD
Screens: Displays Gas Name, Gas Value,& Measuring Units.
Controls: ZERO and SPAN
Interface: Magnetic switches
Environmental
Temperature: -13° to 122°F (-25° to 45°C) Subject to sensor temp limits
Humidity: 5-95 %RH, non-condensing
Enclosure Options
NEMA 4X: Polycarbonate
Dimensions: 5.3 W by 8.7 H by 3.3 D in (13.5 W by 22 H by 8.5 D cm)
Weight: 1.9 lbs. (0.8 kg)
HD (Div 2): Cast Aluminum (Copper-free)
HD (I.S.): Cast Aluminum (Copper-free)
Dimensions: 6.1 W by 10.1 H by 4.9 D in (15.5 W by 25.6 H by 12.4 D cm)
Weight: 4.2 lbs. (1.9 kg)
Explosion-Proof: Cast Aluminum (Copper-free)
Dimensions: 6.1 W by 10.0 H by 4.9 D in (15.5 W by 25.5 H by 12.4 D cm)
Weight: 4.9 lbs. (2.2 kg)
Approval Ratings
UL: Class I, Div 1, Groups B, C, & DClass I, Div 2, Groups A, B, C, &D; Class II, Div 2, Groups F,G
CE Mark: EN55011 & EN61000