Vaisala OMT364 Technical data

OMT364 Oxygen Transmitter for Hazardous Areas

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The Vaisala SPECTRACAP® Oxygen Transmitter OMT364 for hazardous areas.

Features/Beneﬁ ts

Minimizes need for sample

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conditioning equipment

In-situ probe or sampling cell

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Tolerates aggressive chemicals

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Tolerates excessive amounts of

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moisture even in liquid form

Low maintenance

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Calibration interval 12 months

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Software and keypad user

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interfaces and an LCD display

Example applications:

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fermentation, composting process monitoring, inerting processes and ﬂ are gas recovery

The Vaisala SPECTR ACAP® Oxygen Transmitter OMT364 is designed for oxygen monitoring in moist and aggressive process gases.

Laser based measurement

The OMT364 incorporates a compact tunable diode laser (TDL) gas spectrometer built in the measurement probe. This optical measurement technology is well known for unmatched stability and robustness. The patented SPECTRACAP TDL technology in a compact probe suitable for  eld use.

sensor offers uniquely

FM Approved OMT364 for Hazardous Areas

The non-incendive OMT364 transmitter is permitted for use in Class I, Division 2 of the NEC area classi cation according to FM Approvals SM . The probe of the

500

instrument can be installed in areas that are classi ed as Class I, Division 1 or 2.

Direct installation

In many applications, the OMT364 can be  ange-mounted directly into a process. No sampling or sample conditioning equipment is needed. This feature provides real time measurement data without sampling or sample switching delays.

Sampling cell installation

An optional sampling cell is available for processes with high temperatures, elevated pressures or extremely dif cult mechanical conditions. Due to the robustness of the SPECTRACAP sensitivity to gas  ow and pressure variations, the sampling system is simple and it can be installed near the sampling point.

sensor and its low

Technical data

Performance

Measurement range 0 ... 100 % O Accuracy (including noise, linearity and repeatability) ±0.2 % O Temperature range over T range ±2 % of reading Stability ±1 % of reading/yr Zero drift ±0.1 % O

Response time of measurement 3 s Diffusion limited response in still air T63/T

without ﬁ lters 10 s / 20 s with stainless steel mesh ﬁ lter 10 s / 25 s with stainless steel mesh ﬁ lter and

PTFE ﬁ lters 30 s / 70 s Pressure dependence without pressure compensation

0.8 ... 1.2 bar -2 % of reading

1.2 ... 1.4 bar -5 % of reading Accuracy of pressure compensation ±0.25 % of reading Background gas effects for CO

and H2O uncompensated

< 1% of reading for <6 vol -% CO

< 1% of reading for gas dew point < 30 ˚C

Accuracy of background gas compensation

0 ... 50 vol-% CO

±-0.5 % of reading

0 ... 300 g/m3 H2O (Td=80 ˚C) ±1 % of reading

Operating environment

Operating temperature range for

probe (in-line installation) -20 ... +80 ˚C electronics (housing) (Kalrez® seals) transmitter (ambient gas

measurement) -20 ... +60 ˚C Storage temperature range -55 ... +80 ˚C Operating pressure range 0.8 ... 1.4 bar Maximum pressure range for probe up to 10 bar Compliance

IEC(EN)-61326 Electrical equipment for measurement,

control and laboratory use. EMC requirements. Laser safety Class 1 laser product

-20 ... +60 ˚C

Classiﬁ cation

OMT364 CLASSIFICATIONS FOR THE TRANSMITTER

USA and Canada FM, Non-incendive for Class I,

OMT364 CLASSIFICATIONS FOR THE PROBE

USA and Canada FM, Suitable for Class I, Division 1,

Division 2, Groups A, B, C, and D.

Groups A, B, C, and D.

Inputs and outputs

Power supply

input range 11 ... 36 VDC

Power consumption

maximum 6W typical 3W

Analog output 0/4 ... 20 mA sourcing

maximum load 500 Ω Serial output (2-wire, non-isolated) RS-485 Alarm/control relay 30 VAC/60 VDC

Mechanics

Housing material G-AlSI10 Mg (DIN 1725) Probe material AISI 316 Housing classiﬁ cation IP66 Weight, transmitter and probe 2.2 kg Weight, sample cell 2.6 kg Mounting ﬂ ance diameter 97 mm Cable bushing Cable gland M20 x 1.5 Stainless steel mesh ﬁ lter openings ø 310 μm Wetted materials

AISI 316, Kalrez

SiN, MgF

, PTFE (optional),

Options and accessories

Hydrophobic PTFE ﬁ lter, pore size 8 μm with

Kalrez® O-rings 217056 1/2” NPT conduit ﬁ tting 217917 Sample cell with wall-mounting bracket

gas ﬁ ttings for O.D. 6 mm tube

volume 260 m

T63 response time with 1 l/min

sample ﬂ ow and mesh ﬁ lter, 18 s

with Kalrez

O-rings 216619

= -20 ˚C to +60 ˚C

= -20 ˚C to +80 ˚C

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

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