Description
The SEC Millennium Gas Detector for Acetylene are designed to be used as an upgrade in the same applications where catalytic bead sensors have been applied. The Millennium ACE 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
- Routine calibrations are not required
- 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 | Acetylene |
| 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 70°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 |
| 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 Acetylene |
