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RKI Instruments Detector Head, 4-20 mA Transmitter, SD-1GH, 0-2000 ppm CH4 - SD-1GH-CH4-2K
Item #:
SD-1GH-CH4-2K
Brand:
RKI Instruments
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SD-1GH-CH4-2K Detector Head, 4-20 mA Transmitter, SD-1GH, 0-2000 ppm CH4 by RKI Instruments
RKI Instrument's model SD-1 Series smart combustible gas, toxic gas, oxygen, and organic vapor detector/transmitter is a robust and reliable explosion proof design for detecting LEL and ppm levels of hazardous atmospheres. In addition to measuring the common %LEL levels of methane, hexane and isobutane, for example, the SD-1 Series also has the capability of measuring a wide variety of toxic organic compounds in a PPM range such as acrylonitrile, ethylene oxide, n-methyl pyrolidone, methylene chloride and many others. This gives the SD-1 Series a unique niche in RKI's gas detector line-up. The SD-1 has an ATEX/IECEX approval for the explosion class ExdIICT5 and has an IP-65/67 ingress protection rating.
The SD-1 has a 4-20mA signal output as well as relay contacts for interfacing with other control systems or monitoring facilities. All SD-1 types are also available with HART communication instead of 4-20mA relay. SIL2 is available for the IR, EC and OX types. In facilitating non-intrusive conditions in hazardous atmospheres, the SD-1 can be calibrated and it's menus navigated with magnetic switches and a magnetic key.
Features
- Wide range of detectable gases: % LEL Combustibles, catalytic; % LEL Combustibles, IR; H2S, CO, & O2; PPM for acrylonitrile, hydrogen, ethylene oxide, n-methyl pyrolidone, methylene chloride, and many others
- Sensor types include: Catalytic, Galvanic Cell, MOS, IR, & Electrochemical
- Direct digital display of gas readings
- HART Communication protocol or 4-20 linear output
- Available with SIL2 approval (IR, EC, OX versions)
- Easy maintenance using a magnetic key
- Self-diagnosis by microprocessor
- Low power operation (Maximum: 3W)
- Explosion proof: ATEX, IECEx, ExdIICT5
Applications
- LNG Terminal
- Petrochemical/Chemical plants
- Power plant
- Utilities
- Iron and steel works
*Please note we can only ship RKI products to customers within the United States
![](https://s.turbifycdn.com/aah/yhst-8480297768913/industrial-scientific-weather-station-all-weather-sensor-communication-box-ethernet-18109636-1010-22.gif)
Model | SD-1GP |
SD-1RI |
SD-1GH |
SD-1EC |
SD-1OX |
Detection principle | Catalytic |
Infrared |
Semiconductor |
Electrochemical |
Galvanic Cell |
Measuring gas | Variety of hydrocarbons |
See chart below |
CO/H2S |
Oxygen |
|
Measuring range | 0 -100% LEL |
CO: 0-75ppm H2S: 0-30ppm |
0 -25 vol% |
||
Alarm setting | 2 programmable alarm set points/increasing/decreasing/latching/ self resetting/on delays/off delays/energized/de-energized |
||||
Alarm contacts | Normally open or normally closed |
||||
Sampling method | Diffusion (Flow adapter and air aspiration available) |
||||
Display | 4 digit Digital LED |
||||
Output | 4-20 mA or HART (optional without 4-20 mA) |
||||
Relay | 1 Relay with 4-20 mA versions or No relay with HART versions |
||||
Contact capacity | 30 VDC 0.5A or 120 VAC 0.5A (load resistance) |
||||
Fail alert Self diagnosis | Circuit failure / Sensor failure |
||||
Fail alert display | Fail lamp (Yellow) |
||||
Power source | 24VDC (17VDC ~ 26.4VDC) |
||||
Operating Temperature & humidity | -4 ~ + 140°F / below 95% RH (non condensing) [-20 ~ + 60°C], (SD-1EC Below 80% RH) |
||||
Dimension & Weight | 5.8"(W) x 6.3"(H) x 3.5" (D) , Approx. 4.4 lbs [148(W) x 161(H) x 88(D) mm, Approx. 2.0kg] |
||||
Approvals | Exd II CT5,ATEX ** IECEx EN60079-29-1 |
CML 15ATEX1034 IECEX, SIL2 |
Exd II CT5,ATEX, IECEx |
DEKRA 13ATEX0035 IECEx DEK 13.0024X, SIL2 |
Detection Gas |
Formula |
Full Scale Ranges |
TLV-TWA (ppm) |
LEL |
|
Low (ppm) |
High (ppm) |
||||
Acetic acid | C2H4O2 |
500 |
3000 |
10 |
4.0 |
Acetone | C3H6O |
100 |
10000 |
500 |
2.15 |
Acetylene | C2H2 |
200 |
3000 |
- |
1.5 |
Acrylonitrile | C3H3N |
500 |
1000 |
2 |
2.8 |
Ammonia | NH3 |
500 |
1000 |
25 |
15 |
Benzene | C6H6 |
200 |
2000 |
0.5 |
1.2 |
Buthylacetate | C6H12O2 |
100 |
5000 |
150 |
1.4 |
Buthylacrylate | C7H12O2 |
50 |
1000 |
2 |
1.5 |
n-Buthyl alcohol | C4H10O |
100 |
5000 |
400 |
1.4 |
Chloroform | CHCL3 |
200 |
5000 |
10 |
- |
Cyclohexane | C6H12 |
200 |
5000 |
100 |
1.3 |
Cyclohexanone | C6H10O |
50 |
1000 |
20 |
1.1 |
2-ethoxyethyl acetate | C6H12O3 |
100 |
3000 |
5 |
1.7 |
Ethyl acetate | C4H8O2 |
100 |
5000 |
20 |
2.1 |
Ethyl alcohol | C2H5OH |
100 |
5000 |
1000 |
3.3 |
Ethylene | C2H4 |
200 |
5000 |
200 |
2.7 |
Ethylene oxide | C2H4O |
100 |
1000 |
1 |
3.0 |
R-11 | CCI3F |
2000 |
5000 |
1000 |
- |
R-12 | CHCIF2 |
300 |
5000 |
1000 |
- |
Hydrogen | H2 |
200 |
10000 |
- |
4.0 |
Hydrogen Specific | H2 |
200 |
2000 |
- |
4.0 |
Hydrogen sulfide | H2S |
20 |
2000 |
- |
4.0 |
Isopropyl alcohol | C3H8O |
300 |
5000 |
200 |
2.0 |
Methane | CH4 |
2000 |
100%LEL |
- |
5.0(CH4) |
Propane | C3H8 |
2000 |
100%LEL |
- |
2.0(C3H8) |
Methyl alcohol | CH3OH |
100 |
5000 |
200 |
5.5 |
Methyl bromide | CH3Br |
200 |
1000 |
5 |
8.6 |
Methyl ethyl ketone | C4H8O |
30 |
5000 |
200 |
1.8 |
Methyl isobutyl ketone | C6H12O |
50 |
500 |
50 |
1.2 |
Methylene choride | CH2CI2 |
500 |
5000 |
50 |
13.0 |
n-Hexane | n-C6H14 |
100 |
5000 |
50 |
1.2 |
Tetrahydrofuran | C4H80 |
20 |
3000 |
100 |
1.2 |
Toluene | C7H8 |
20 |
3000 |
100 |
1.2 |
Trichloroethylene | C2HCl3 |
300 |
5000 |
50 |
7.9 |
Vinyl chloride | C2H3Cl |
200 |
3000 |
5 |
3.8 |
Xylene | C8H10 |
100 |
2000 |
100 |
1.0 |