SIEMENS,Room sensors, QFA41… ,for relative humidity and temperature with calibration certificates
Room sensors
QFA41…
for relative humidity and temperature with calibration certificates
• Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Capacitive humidity measurement
• Recalibration service
• Test function for loop test
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r. h.
Use
The QFA41… sensor is used in ventilation and air conditioning plants requiring:
• Very high accuracy and reliability for measuring relative humidity and temperature
• Regular recalibration and readjustment of the sensors
Examples:
• Storage and production facilities in the paper, textiles, pharmaceutical, chemical, electronics industries, etc.
• Laboratories
• Hospitals
• Computer centers
• Greenhouses
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Siemens Modulating refrigerant valves with magnetic actuator, PN 32 M3FK..LX.. hermetically sealed, for condenser control
- Mixing or straight-through valves with magnetic actuator for modulating
capacity control of condensers.
? Short positioning time (approx. 1 s)
? High resolution
? High rangeability
? Hermetically sealed
? Versatile electrical interface
? Friction-free
? Port 1 -> 3 closed when de-energized
? Robust and maintenance-free
Siemens MXG462S..Modulating control valve with magnetic actuator‚ PN16
Short positioning time (< 2 s), high-resolution stroke (1 : 1000)
∂ Selectable valve characteristic: equal-percentage or linear
∂ High rangeability
∂ Operating voltage AC / DC 24 V
∂ Selectable standard signal inputs DC 0/2…10 V or DC 0/4…20 mA
∂ DC 0…20 V Phs phase-cut signal input for Staefa controllers
∂ Indication of operating state, visible from the outside
∂ Wear-free inductive stroke measurement
∂ Low friction, robust and maintenance-free
∂ Spring return facility: A↑ AB closed when de-energized
∂ Positioning control, position feedback and manual control
∂ Parts in contact with medium in CrNi steel
∂ MXG462S50-30 applications with demineralized water upon request
Siemens MXG461.. Modulating control valves with magnetic actuators, PN 16
Fast positioning time (<2 s), high-resolution stroke (1 : 1000), high rangeability
? Equal-percentage or linear valve characteristic (user-selected)
? Operating voltage AC / DC 24 V
? Switch-selected control signal DC 0/2…10 V or DC 4…20 mA
? DC 0…20 V phase cut control signal with SEZ91.6 external interface
? Indication of operating state, position feedback and manual control
? Wear-free inductive stroke measurement
? Fail-safe feature: A ? AB closed when de-energized
? Low friction, robust, no maintenance required
Siemens QFM31..Duct sensors for rel. humidity / temperature for demanding requirements
• Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Function test
• Capacitive humidity measurement
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r.h.
Modulating control valves with magnetic actuator,PN 16
MVF461H..
for hot water, high temperature hot water and steam
• Short positioning time (<2 s), high resolution (1 : 1000)
• Selectable valve characteristic: Equal-percentage or linear
• High rangeability
• Selectable standard interface DC 0/2…10 V or DC 0/4…20 mA
• Phase-cut signal input for Staefa controllers
• Position control and position feedback signal
• Wear-free inductive stroke measurement
• Spring return facility: A → AB closed when deenergized
• Low friction, robust and maintenance-free
Modulating refrigerant valves with magnetic actuator, PS45
MVL661..-..
Hermetically sealed, for safety refrigerants
· One valve type for expansion, hot-gas and suction throttle applications
· Hermetically sealed towards outside
· Selectable standard interface DC 0/2…10 V or DC 0/4…20 mA
· High resolution and control accuracy
· Precise positioning control and position feedback signal
· Short positioning time (< 1 s)
· Closed when deenergized
· Robust and maintenance-free
· Six valve sizes with kvs values from 0.25 to 12 m³/h
Use
The MVL661..-.. refrigerant valve is designed for modulating control of refrigerant
circuits including chillers and heat pumps. It can be used in expansion, hot-gas and
suction throttle applications as well as with all commonly used safety refrigerants (R22,
R134a, R227ea, R404A, R407C, R410A, etc.) and R744 (CO2).