PQD Series PQD-7434 Formaldehyde gas detector is designed to detect Formaldehyde gas in the industrial areas.
With ATEX / IECEx, SIL2 certifications, EN 60079-29: 1 performance approval, and high ingress protection class, it has proved its suitability for harsh environmental conditions.
The Electrochemical sensor employed PQD-7434 provides excellent output in the 0-10ppm range.
Easy and Safe Use
• OLED Display: 128x64 large, bright and clear display indicates gas level, detector status and it can be seen in dark locations and different angles easily
• Non-Intrusive Calibration: Zero and Span calibration can be done by a single operator via using magnetic keys without opening the lid in the hazardous area.
• Logging: Stores all alarm, fault, and maintenance events up 250logs to provide a history of the detector. Also, it protects the data thanks to the battery on itself
• Monitoring: Gas concentration trends for the last 8 hours can be monitored on the OLED screen as it is recording the measurement data
• Remote Control: PQ offers up to 15meters remote control option for applications that sensor and transmitter specifically require separate locations. Moreover, the detector status can be also monitored via Prosense Gas Monitoring software remotely.
• Magnetic Control: Many settings can be adjustable via using a magnetic key.
Easy Maintenance and Simple Installation
• Checking: Relay contacts can be activated or deactivated easily through a user-friendly PQD menu
• Simulation: 4-20mA analog output can be simulated in different values for the test purposes even if there is no target gas in the environment.
• Analog Values: Fault, Warm-up, Calibration, Inhibit, and Overrange values are adjustable.
• Adress: Modbus addresses can be set on the detector menu. No need onboard addressing switches anymore.
• Calibration: Reminds the user when calibration is due to ensure that sensors remain operational and accurate at all times
• Relays: Alarm levels and related parameters can be fully adjustable through the detector menu.
• Sensor Replacement: Allows sensor replacement with pre-calibrated sensor head to provide easy maintenance.
• Modbus: PQ can be integrated into SCADA systems easily via open-source Modbus RS485(RTU) codes.
Reliability
• Bump Test: The status of the detector can be checked periodically. Ensure that the sensors will respond to their target gas and that the alarms will function
• Calibration Due Warning: Reminds the user by giving Fault when calibration is due
• Wide Range Sensors: High-quality PID, Pellistor, Electrochemical, Infrared, Semiconductor employed PQ provides excellent output for the target gas.
| Sensor Technology | Electrochemical |
| Output Signal | 4-20mA Analog and RS485 Modbus RTU |
| Sensor Warm-Up | 60sec |
| Response Time(T90) | <30sec |
| Accuracy | %±1 |
| Operating Temperature | -40°C ~ +70°C |
| Humidity | 0~ 100%RH Non-Condensing |
| Input | Min 10VDC - Max 32VDC - Nominal 24VDC |
| Display | 128x64 Graphic OLED, 5 LED indicator for detector status |
| Event Logging | Records alarm, fault and maintenance events up to 250 logs |
| Power Consumption | Max. 4W |
| Relay Outputs | 2 Alarms (Programmable) and 1 Fault (All relays are NO/NC adjustable) |
| IP Rating | IP65 / IP66 |
| Junction Box | Epoxy Painted Die-Cast Aluminum / 316 Stainless Steel |
| Sensor Head | 316L Stainless Steel |
| Dimensions/Weight | 196,96x145,99x112mm / 2100gr |
| ATEX Marking | II 2G Ex db IIC T6 Gb II 2G Ex mb db IIC T6 Gb I M2 Ex db I Mb |
| Hazardous Class | Zone 1 - Zone 2 - M2 |
| Certificates | ExVeritas 18 ATEX 0371X IECEx EXV 18.0021X FTZU 18 ATEX 0086 IEP12 ATEX 6118X SIL2 |
| Standards | IEC EN 60079-0 IEC EN 60079-1 IEC EN 60079-18 IEC EN 60079-29-1 |
| PQ-3R+ | Provides 2xAlarms, 1xFault Relay Contacts |  |
| P-IP66 | Stainless Series IP66 Adapter |  |
| P-ASU | Prosense Sampling Unit |  |
| PQD-SS | PQD SS316L Stainless Series Enclosure |  |
| P-GTA | Celling Mount Collecting Cone |  |
| PK-KEP | Prosense Calibration Cap |  |
PQD Datasheet