Intrinsically Safe IR Sensor For Hazardous Locations

Typical Applications

Petrochemical – condition monitoring
Bearing, gearbox and motor housing surface temperatures in refineries and chemical plants can be monitored without contact, eliminating the need to replace contact probes that are easily damaged by vibration.
Petrochemical – liquid storage and processing The sensor can be positioned in a Zone 0 environment such as the top of a tank of hazardous liquid or reactor, to measure the surface temperature of the liquid.
Paper
Dust in pulp, paper and packaging plants can create a fire and explosion hazard. The OSAT intrinsically safe pyrometer can be used for paper web temperature measurement and condition monitoring in ATEX and IECEx classified hazardous areas.
Coal conveyors
The OSAT fast 240 ms response time makes it ideal for measuring the surface temperature of coal on conveyors, as well as other bulk materials where there is an explosive dust hazard.
Gas cylinder filling
The surface temperature of cylinders of explosive gases is monitored with the OSAT as they are filled. The Group IIC, T4 classification makes it suitable for almost all gases including propane, butane, hydrogen and acetylene. The temperature of each cylinder is measured on the filling rig to help detect fault conditions in filling, to calculate the final filled volume (in conjunction with the pressure), to ensure the volume is repeatable, and to improve the filling rate.
Automotive painting
Solvents in automotive painting can create a gas explosion risk. The intrinsically safe OSAT may be used to monitor the temperature of containers and vessels, the surface temperature of liquids and powders, and the temperature of painted surfaces.
Offshore
The OSAT 316 stainless steel housing and intrinsically safe certification makes it well-suited for use on offshore platforms. As well as measuring the temperature of surfaces on the rig, it can be used to measure the temperature of the sea surface.

General Specifications
Output: 4 to 20 mA
Maximum Temperature Span: 1000°C (1832°F)
Minimum Temperature Span: 100°C (180°F)
Field of View: See To Order chart on next page for details
Accuracy: ±1°C or 1%, whichever is greater
Repeatability: ±0.5°C or 0.5%, whichever is greater
Emissivity Setting Range: 0.20 to 1.00 (pre-set to 0.95)
Emissivity Setting Method: User configurable via USB interface Response Time, t90: 240 ms (90% response)
Spectral Range: 8 to 14 µm
Supply Voltage: 12 to 24 Vdc, ±5%
Maximum Current Draw: 25 mA
Construction: Stainless Steel 316
Dimensions: ø20 x length 150 mm (5.9″)
Mounting: M20 x 1.5 mm thread, length 46 mm (1.81″), supplied with two mounting nuts
Cable Length: 5, 10 or 25 m (16.4, 32.8, 82′) as standard (custom lengths also available)
Weight: 475 g (1 lb), with 5 m (16.4′) cable
ENVIRONMENTAL
Environmental Rating: NEMA 4 (IP65)
Ambient Temperature Operating Range: 0 to 70°C (32 to 158°F)
Relative Humidity: 95% non-condensing maximum
HAZARDOUS AREA
CLASSIFICATION
ATEX Classification: Ex II 1GD
IECEx Classification (Gas): Ex ia IIC T4 Ga
IECEx Classification (Dust): Ex ia IIIC T135°C IP65 Da
Ambient Temperature Rating: -20°C ≤Ta ≤70°C
Maximum DC Input Voltage: Ui = 28V
Maximum Input Current: Ii = 93 mA
Maximum Input Power: Pi = 650 mW
Maximum Internal Capacitance: Ci = 8 nF
Maximum Internal Inductance: Li = 0 mH
ATEX Certificate Number: CML 14ATEX2079
IECEx Certificate Number: IECEx CML 14.0032