Toll Free
Toll Free
The Ultra1000 Series is a 24 VDC powered toxic gas detector consists of an interface module in a flame proof instrument enclosure and a 316 Stainless Steel sensor head assembly. The detectors monitors a variety of toxic gases in the parts per million (ppm) range, including: ammonia, carbon monoxide , chlorine, chlorine dioxide, hydrogen, hydrogen chloride, hydrogen sulfide, nitric oxide, nitrogen dioxide, oxygen deficiency, and sulfur dioxide.
The interface module is microprocessor-based electronic assembly with analog and digital circuitry to process the sensor signal for control, data display and to transmit the signal to a Gas Control Panel or to a PLC. In addition, Ultra1000 Series detector includes warning, alarm, and fault relay contacts that can be used to indicate an alarm or fault condition and Modbus communication
PT295 Series Gas Detector
Sensor Type
Electrochemical Cell
Measuring Range
| Ammonia (NH3) | 0-50 ppm |
| Carbon Monoxide (CO) | 0-100, 0-1000 ppm |
| Chlorine (CL2) | 0-10 ppm |
| Chlorine Dioxide (CLO2) | 0-50 ppm |
| Ethylene (C2H4) | 0-100 ppm |
| Ethylene Oxide (C2H4O) | 0-50 ppm |
| Hydrogen Chloride (HCL) | 0-20 ppm |
| Hydrogen Sulfide (H2S) | 0-100, 0-500 ppm |
| Hydrogen (H2) | 0-200ppm |
| Methyl Mercaptan (CH3SH) | 0-100 ppm |
| Nitrogen Dioxide (NO2) | 0-20 ppm |
| Nitric Oxide (NO) | 0-100 ppm |
| Oxygen Deficiency (O2) | 0-25 %(volume) |
| Sulfur Dioxide (SO2) | 0-100 ppm |
± 2 ppm or ± 10% of reading, whichever is greater.
Zero Drift
< 5% per year
Response Time
| CO, H2, H2S, NO2 | T90 < 30 s |
| NO, SO2 | T90 < 15 s |
| NH3 | T90 < 60 s |
| O2 | T90 < 15 s |
Electrical Classifications
Explosion Proof Enclosure
| ATEX: | II 2G Ex d IIC T6 |
| CSA: | Class I, Div 1 & 2, Groups B, C & D C22.2 No 30-M1985 & C22.2 No 142-M1987 |
CSA, ATEX / IECEx, ABS Type Approved
Operating Temperature Range
H2S: -40°F to +149°F (-40°C to +65°C) (intermittent)
All others: -30°F to +122°F (-34°C to +50°C)
Humidity Range
15 – 90% RH (non condensing)
Storage Temperature
Electronics Interface Module:
-40°F to +185°F (-40°C to +85°C)
Sensor Head Assembly:
32°F to +68°F (0°C to +20°C) (cell)
Dimensions
| Height: | 7.4 inches (188 mm) |
Width: |
6.2 inches (159 mm) |
Depth: |
4.9 inches (125 mm) |
Ingress Protection
NEMA 4X, IP66
Display and Indicators
Power Input
12- 28 VDC (24 VDC Nominal)
Power Consumption
< 1 Watt
Alarm Relays
Programmable Low and High Alarms, Fault Alarm
SPDT Form “C” Relay
2 A @ 250 VAC or 30 VDC
Analog Output
Linear 4-20 mA output
Fault: | 0 mA |
Calibrate Mode: | 2 mA |
Over Range: | > 21 mA |
Digital Output
Half Duplex RS-485
MODBUS RTU Protocol
Input / Output Protection
Cable Requirement
Three wire shielded cable for power and analog signal.
Max of 300 Ω load for analog output
Dust or Splash guard, Flow Adapter with tube fittings, Sensor Duct Mount Kit, Pole Mount brackets.
3/4" NPT Female Adapter available for 1/2” NPT or M20
© 2020 – 2025 Pem-Tech, Inc. 12144 Dairy Ashford, Building 2, Sugar Land, TX 77478 Toll Free: 800-379-3894Phone: 281-494-2079Fax: 281-494-2167
