Description
The SEC Millennium hydrocarbon gas detectors are designed to be used in the same applications where catalytic bead sensors have been used. The Millennium HT is a complete self contained optical hydrocarbon gas detector. The sensing and reference elements are self-compensating for optical integrity and other signal inhibitors. The industry standard 4-20 mA analog output provides remote alarm, fault and calibration signals.
Applications
- Refineries
- Drilling and production platforms
- Fuel loading facilities
- Oil well logging
- LNG/LPG processing and storage facilities
- Gas turbines
- Chemical plants
- Compressor stations
- Wastewater treatment facilities
- Transportation facilities
Features
- Reliable infrared sensing technology
- Virtually maintenance free
- Low cost of ownership, over five years operating life
- Immune to poisoning and etching
- Designed for harsh environments
- Explosion proof
- Fast response time
- Rugged stainless steel construction
- Smart calibration
- Patented self compensating optical bench and no moving parts
- Heated optical chamber
- Low power consumption
- Operates in constant hydrocarbon background and anaerobic atmosphere
- Fault indications for all failure states
- Frequent calibrations are not required. Zero calibrate every 12 months.
- 4-20 mA output
- 0 to 100% LFL detection range
- Can be coupled with SEC 3100 transmitter for network applications
- RS-485 communication link
- Digital display optional
Specifications
| Detectable Gases | Methane, Propane, Hexane, Isopropyl Alcohol |
| Range | 0-100% LFL |
| Accuracy | ±3% to 50% LFL or ±5% 51 to 100% LFL |
| Detection Method | Diffusion, optional sample draw, requires a minimum of 1 LPM flow rate |
| Power Consumption | 5 watts |
| Analog Output | 4-20 mA, max 1000 Ohm load at 24 VDC supply voltage |
| Response Time | T50 < 5 seconds, T90 < 10 seconds |
| Operating Temperature | -40 to 95°C, 0-99% RH, non condensing |
| Operating Range | 18 to 32 VDC measured at detector head |
| Max Current Draw | At 24 VDC: Average 210 mA, Peak 400 mA |
| Construction | 316 stainless steel |
| Classification | Class I, Div I, Groups B, C, D, T5 |
| Approvals | C 22.2 No. 152-M1984 (R1997) |
| Installation Category | Cat I, Pollution Degree 2 |
| Weight | 5 pounds |
Unit Status Chart
|
Current
|
Output
|
Status
|
|
4-20
|
mA
|
Normal measuring mode |
|
0.0
|
mA
|
Unit fault |
|
0.2
|
mA
|
Reference channel fault |
|
0.4
|
mA
|
Analytical channel fault |
|
0.8
|
mA
|
Unit warm up |
|
1.0
|
mA
|
Optics fault |
|
1.2
|
mA
|
Zero drift fault |
|
1.6
|
mA
|
Calibration fault |
|
2.0
|
mA
|
Unit spanning |
|
2.2
|
mA
|
Unit zeroing |
|
4.0
|
mA
|
Zero gas level |
|
5.6
|
mA
|
10% of full scale |
|
8.0
|
mA
|
25% of full scale |
|
12
|
mA
|
50% of full scale |
|
16
|
mA
|
75% of full scale |
|
20
|
mA
|
100% of full scale |
|
20.1-23
|
mA
|
Over range (>100%) |
Ordering Information
For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com
| Description | |
| SEC Millennium Infrared Hydrogen Gas Detector for Methane, 0-100% LEL | |
| SEC Millennium Infrared Hydrogen Gas Detector for Propane, 0-100% LEL | |
| SEC Millennium Infrared Hydrogen Gas Detector for Hexane, 0-100% LEL | |
| SEC Millennium Infrared Hydrogen Gas Detector for Isopropyl Alcohol, 0-100% LEL |
