Features

Low Maintenance.

4-20mA Analog Output

Optional RS485 MODBUS RTU Serial Communication

12-28 VDC Operation

Automated Non-Intrusive Calibration

Optional Adjustable Alarm Relay Contacts

Liquid Crystal display with back light

Description

Ultra 1000-IR series is a microprocessor based sensor for detection of Carbon Dioxide (CO2) gas using Infrared sensor technology. The self- contained sensor features user friendly interface and menu driven calibration procedure and configuration.

Ultra 1000-IR uses NDIR (Non Dispersive Infrared) technique to monitor the CO2 vapors. The detection principle is based on measuring the absorption of infrared radiation using dual wavelength infrared detectors. The IR detectors measure the intensity of two wavelengths, one absorbed by the target gases and other unaffected by the target gases. The gas concentration is determined by comparing the detector signals.

The complete sensor consists of a stainless steel sensor head assembly, a user connection board and a transmitter board assembly. All of the sensor electronics are enclosed in an explosion proof instrument box. Ultra 1000-IR provides a 4-20mA signal proportional to 0-100% LEL gas at the sensor. In addition the sensor may be addressed via MODBUS RTU interface. The MODBUS output provides sensor status, alarm & fault conditions.

Specifications

Sensor Type

NDIR (Non Dispersive Infrared) absoprtion

Measuring Range

0-5% , 0-10% & 0-50%

Repeatability

± 2 % Full scale

Zero Drift

< 2% per year

Response Time

T50 < 8 seconds T90 < 15 seconds with 100% LEL gas applied

Classification

Class I, division 1, Groups B,C & D

Operating Temperature

-40°F to +158°F (-40°C to +70°C)

Operating Humidity

5% to 90% RH, non-condensing

Display

2 lines by 8 Character LC Display with back light

Mechanical Specifications

Length: 7 inches (178 mm)

Width: 5 inches (127 mm)

Height: 4.5 inches (114 mm)

Status Indicators

LC Display for gas concentration, Alarm relay status, calibration mode and sensor fault status.

Input Power

14-28 VDC. 24 VDC nominal

Power Consumption

90mA @ 24 VDC Typical

Alarm Relays

Fully programmable. 0 to Full scale range of the sensor. Latching or Non-Latching.

Relay Ratings

SPDT Form “C” type Relay contacts

5 Amps @ 250 VAC or 30 VDC

Analog Output

Linear 4-20mA (300 Ohms max. load)

2.0 mA - Calibration mode

< 1.0 mA - Sensor malfunction

Interface

RS-485 MODBUS RTU at 9600 Baud.

Calibration

Non-Intrusive activated by internal magnetic switch