Electrochemical NH₃
EC-F9-NH3-0/100-N/1

The EC-F9-NH₃ sensor utilizes a disposable electrochemical sensor that is easily replaced by simply unplugging the old sensor and plugging in a new one (estimated time to change: about 30 seconds). The sensor has a matching pre-amplifier electronics unit that provides a linear 4/20 mA signal or 485 Modbus communication output. When exposed to ammonia, the electrochemical cell outputs a signal that is proportional to the gas concentration.

Characteristics

• Because of the electrochemical sensor's selectivity to ammonia, it is excellent for low ppm trip levels (as low as 10 ppm). The best range to consider is the 0-100 ppm unit.
• Electrochemical sensor life is normally 3 to 4 years in a cool environment, i.e., below 75°F. In hot machine room environments, the life may shorten to about 1.5 to 2 years. Even though the sensor can be exposed to high concentrations of NH₃ with minimal loss of life, extremely high concentrations over hours of exposure can deplete the sensor.
• From our long-term experience in the field, Manning Systems recommends checking electrochemical sensors (as well as all MSI sensors) once every six months with certified calibration gas. A "bump test" is recommended every three months if a room does not have multiple sensors. Manning Systems sensors are calibrated easily in the field with certified calibration gas that is always available from us. Our entire calibration process takes about two minutes and any adjustment can be made quickly and easily at the sensor. Because our sensors are calibrated in place, there is never a moment when the facility is left unprotected and, most importantly, the sensor is calibrated in its actual operating environment, not under ideal lab conditions.
• Manning Systems latest innovation is its new family of gas sensing instruments with microprocessor-based SensorCheck™ technology. The revolutionary new SensorCheck™ technology monitors Manning Systems EC-F9-NH₃ ammonia sensor by testing it every 24 hours for electrical viability. If a sensor dries up or is disconnected, SensorCheck™ sends an indication that can be detected by a Manning Systems Gas Monitor or a PLC.
• For redundancy and faster response to leaks, Manning Systems recommends multiple sensors (EC, IR or solid-state) in highly critical areas.
• The electrochemical sensor, housed in a heavy-duty #16 gauge epoxy coated steel enclosure, is specific to NH₃, and, for food processing environments (i.e., moisture and low temperatures), there is no better method for NH₃ detection at present.
• Always remember...there are NO absolutely fail-safe sensors.
• The EC-F9-NH₃ with optional ATMOS equipped^® technology allows it to meet all of its performance specifications down to -50° F and in condensing humidity environments or during washdown. ATMOS (Adaptive Temperature and Moisture Optimizing System) is a comprehensive, enviro-adaptive technology that actually senses the surrounding environment and creates a controlled, mini-atmosphere inside the sensor enclosure to optimize the air sample quality. ATMOS allows the EC-F9-NH₃ to automatically adapt to its environment and provide accurate and reliable performance under the harshest conditions.

Where to apply

• This sensor is ideal for processing rooms, refrigerated rooms, blast freezers, and in rooms where gas-driven forklifts are used or areas where excellent selectivity to the target gas is required.
• The electrochemical sensor is ideal for refrigerated rooms where fruit is stored as the sensor does not respond to ethylene gas. Ice cream room applications are ideal because of the sensor's ability to sense at low ppm levels (25 ppm or lower).
• Stainless steel housings and explosion-proof designs are available.