- Dual Sensor Capability
- Non-Intrusive One-man Calibration
- Ex Proof Enclosure Class 1, Div 1 & 2, Groups A, B, C, & D
- Local Digital Display with Bargraph & Trending
- User Adjustable Dual Alarm Relays
- 4-20 mA Analog Output
- RS-480 Modbus Optional
- NRTL CSA Approvals, ATEX Optional
The instrument’s fault supervision circuitry continuously monitors for failed sensor cell and communication line breaks. Plus sensor cell operation is continuously supervised 24/7 and when used in conjunction with distributive control systems or PLCs, provides immediate fault identification for a disconnected sensor cell.
The ST-48 is housed in a NEMA 7 explosion-proof enclosure suitable for Class 1, Division 1 and 2, Groups A, B, C, and D. The monitor can be used to detect Carbon Monoxide, IPA, Hydrogen, Hydrogen Sulfide, Ethanol, Propane, and other toxic gases. Capable of monitoring ppm levels of toxic gas or % LEL levels of combustible gases, the ST-48 is a perfect monitoring solution for providing worker protection in chemical plants, refineries, and other areas requiring hazardous classifications.
| Sampling Method |
Diffusion |
| Gases Detected¹ |
Carbon Monoxide (CO)
Ethyl Acetate (C4H8O2)
Hydrogen Sulfide (H2S)
Isopropyl alcohol (IPA)
Methane (CH4) |
| Accuracy |
± 10 % of Reading |
| Operating Temperature |
-40 to +50 ºC
-40 to +122 ºF |
| Display |
68 x 128 pix LCD Displays 30-min Trend, Bargraph & 0.6″ Concentration Data |
| Sensor Type |
Disposable Electrochemical or LEL Catalytic Bead |
| Sensor Life |
2 to 5 years under Normal Conditions |
| Signal Outputs |
4-20 mA analog output |
| Power Requirements |
24 VDC
95 mA |
| Width |
5.12 in
130.05 mm |
| Height |
5.0 in
127 mm |
| Depth |
8.0 in
203.2 mm |
| Weight |
4.7 lbs
2.1 kg |
|
| Enclosure |
Stainless Steel |
| Optional Extras |
Alarm Output: 3ea. Alarm Relays: Low and High-Level Gas Alarm and System Fault
Signal Output: RS-485 Modbus Digital Communications |
| Country of Origin |
USA |
| Harmonized Tariff Code |
8531.10.0045 |
1 Contact PureAire Monitoring for additional gases
One or Two Gas Monitoring
The PureAire ST-48 electronics are capable of monitoring one gas or two different individual gases simultaneously with one transmitter. The Dual Sensor Configuration displays two-gas readings and outputs 4-20 mA outputs for each gas to remote controllers.
