Gas Analyzers

Model OT-3

O₂ in Natural Gas Analyzer

Description

The Model OT-3 is designed to run continuously for years with minimal maintenance and streamline the work of field technicians. This innovative instrument utilizes new sensor technology engineered with CO₂ resistant electrolytes. In addition, the sensor has a built-in acid gas scrubber (patent pending).

The System

The OT-3 natural gas oxygen measurement system accurately monitors trace oxygen levels in a variety of gases at the ppm level. The transmitter is equipped with two user-selectable oxygen analysis ranges and is acceptable for operation in Class I, Division 2, Groups B, C and D hazardous environments when used in conjunction with a non-incentive power source.

The system is housed in a weatherproof NEMA-4 case with a front door that swings open for easy access to the Micro-fuel Cell and transmitter controls. The OT-3 is designed to work with a variety of Flow Computers, such as TotalFlow or FlowBoss, and the system can be ordered in either AC or DC powered versions.

The Sensor

The heart of the system is Teledyne’s own A-2CNG Micro-fuel Cell oxygen sensor. This cell is a sealed electrochemical device which translates the amount of oxygen present in a sample into an electrical current. Unlike other sensors on the market, it comes complete with a built-in acid gas scrubber. By restructuring this sensor to accommodate the scrubber simplifies upkeep while minimizing the instrument size.

Additional Features

Two analysis ranges, user-selectable
Designed to work in tandem with the predominant FCUs in the industry
Operates at as low as 10 VDC
High sensitivity (0.5% FS)
High accuracy (± 2% of FS at constant temperature
Insensitive to flow variation
Fast response and recovery
Long-life maintenance-free Micro-fuel Cell sensor
Unaffected by reducing agents (HCs, CO, SO₂, etc.)
Easy to calibrate; no zero gas required
Rugged NEMA-4 bulkhead mount enclosure
Stainless steel sample system
H₂S scrubber
Optional heater

Features

Ranges: Two user selectable ranges can be set between 0-10 ppm and 0-9999 ppm O₂
Signal output: Voltage: 0–10 VDC, negative ground Current: 4-20 mA, negative ground
Range ID: 0-10 VDC
Alarms: Two user-settable non-latching alarms, with user adjustable programmable 0-20 min delay; one power failure relay (All are failsafe.)
Sample system: Pressure regulator to control inlet sample pressures 5-2000 PSIG
Coalescing filter, H2S Scrubber, Manual Span
Gas Valve Sensor: InstaTrace CO₂: Trace Oxygen sensor for CO₂ containing backgrounds
Accuracy: ± 2% of full scale at constant temperature; ± 5% of full scale through operating temperature range (at 100 ppm and higher user defined ranges) once temperature equilibrium is reached
± 1 ppm for 10 ppm range under above conditions
Response time: 90% in less than 65 seconds at 68°F (25°C)
System power requirement: AC (100-240 VAC, 50/60Hz @ 2.8W), or DC (10-36 VDC @ 2.8W)
System enclosure: NEMA-4 enclosure. 15.85" x 11.8" x 8.1" (40 x 30 x 20.6 cm)

Specifications

Ranges	Two user-selectable ranges between 0-10 ppm and 0-9,999 ppm oxygen and a 0-25% (nominal) air calibration range Range ID: 0-10 VDC
Sensor Type	A-2C or A-2C InstaTrace / B-2C or B-2C InstaTrace for low CO₂ streams
Signal Output	Voltage: 0-10 VDC, negative ground Current: 4-20 mA, negative ground
Accuracy	± 2% of FS at constant temperature ± 5% of FS through operating temperature range (at 100 ppm and higher) once temperature equilibrium is reached ± 1 ppm for 10 ppm range under above conditions
Sensitivity	0.5% of FS
Display	Light emitting diode (LED) display
Temperature	32° to 122°F (0° to 50°C)
Response Time	90% in less than 65 seconds at 77°F (25°C)
Power	AC: 100-240 VAC, 50/60 Hz at 2.8 W) DC: 10-36 VDC at 2.8 W
Alarms	Two user-selectable non-latching alarms, with user adjustable programmable 0-20 min delay One power failure relay (all are failsafe)
Enclosure	NEMA-4 enclosure; suitable for use in Class 1, Div 2 as long as they relay ratings are followed: DC Rating: 0-30 VDC maximum at 0.9 amps maximum AC Rating: 125 VAC maximum at 0.2 amps maximum; Minimum reliable switching rating: 10 + A at 10 mV
Dimensions	15.8"H x 11.8"W x 8.1"D (40 x 30 x 20.6 cm) 30.9 lbs (14 kg)

Downloads

Title	File Size
Model OT-3 Brochure	2.14MB
Model OT-3 Manual	2.80MB

About Us

Founded in 1964, Teledyne Analytical Instruments manufactures gas and liquid analyzers, sensors and custom integrated analysis solutions. This includes hazardous area solutions meeting current NEC, ATEX and IECEx standards. TAI has an ISO 9001 certified quality management system in place.