HVAC Controls and Instrumentation Archives

Lead and oversee all HVAC controls and instrumentation activities, including system design, installation, calibration, testing, commissioning, and maintenance. Ensure optimal performance of HVAC automation systems, BMS integration, sensors, controllers, and related instrumentation while maintaining compliance with safety, quality, and operational standards. Manage technical teams, troubleshoot complex control issues, coordinate with engineering and maintenance departments, and drive continuous improvement in system efficiency and reliability.

10 in stock

606 Adjustable Differential Pressure Switch

606.0001+1001 / Air Diff. Press. Switch, 20-300Pa, silver contact, screw terminal with fixing kit

43.0 AED

Specifications:

Adjustable range: 4 ranges, see models
Pressure limit: 7500Pa (-30~75°C)
Working and storage temperature: -30~75°C
Pressure port: Φ5.0mm ID PVC tube, +/P1 is high, -/P2 is low
Service life: over 106 switching cycles
Electrical contact: SPDT, 2A/250VAC, 1A/30VDC
Max. switching frequency: 6 switching cycles/min
Electrical connection: Flag or screw terminals
Repeatability: ±2%
Materials: housing PC, diaphragm silicone, contact silver plated brass
Weight: 135g with bracket, 85g without bracket
Protection: IP54
Approval: CE

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10 in stock

606.0101+1001 / Air Diff. Press. Switch, 50-500Pa, silver contact, screw terminal with fixing kit

43.0 AED

Specifications:

Adjustable range: 4 ranges, see models Pressure limit: 7500Pa (-30~75°C) Working and storage temperature: -30~75°C Pressure port: Φ5.0mm ID PVC tube, +/P1 is high, -/P2 is low Service life: over 106 switching cycles Electrical contact: SPDT, 2A/250VAC, 1A/30VDC Max. switching frequency: 6 switching cycles/min Electrical connection: Flag or screw terminals Repeatability: ±2% Materials: housing PC, diaphragm silicone, contact silver plated brass Weight: 135g with bracket, 85g without bracket Protection: IP54 Approval: CE

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10 in stock

606.0201 +1001 / Air Diff. Press. Switch, 100-1000Pa, silver contact, screw terminal with fixing kit

43.0 AED

Specifications:

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2 in stock

A2000/C2000 Differential Pressure Gauge

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Specifications:

Service: Air and non-combustible compatible gases
Housing: Die-cast aluminum case and bezel, with PC cover
Protection: IP67
Accuracy: ±2%FS (±3% on 125Pa, ±4% on 60Pa) @21°C
Pressure Limits: -70 to 100 kPa
Size: 101.5mm (4") diameter dial face, 115.5 mm (4-9/16”) dia. opening for flush mount
Temperature Limits: -7 to 60°C (20 to 140°F)
Connections: 1/8" NPT female high and low pressure taps, duplicated, one pair side and one pair back
Weight: 440g
Mounting method: Flush or surface in vertical position
Standard accessory: Model A-S10, including two 1/8”NPT pipe plugs, two1/8” NPT to 3/16” rubber tubing adapters and three flush mounting adapters with screws
Other Accessories: sold separately, see Accessories
Approval: RoHS (A2000)

10 in stock

AVT25101 / Air Velocity Trans, ±(0.2m/s+5% reading), Range 0~5/10/15/20m/s, Probe 210mm, IP65

452.0 AED

Specifications:

Air velocity sensor: Hot-film sensor
Range: 0~5/10/15/20m/s or 0~16/32/48/64ft/s, jumper selectable
Accuracy: m/s:±(0.2m/s+5% reading) or ±(0.2m/s+3% reading) @0.5~20m/s; ft/s:±(0.65ft/s +5% reading) or ±(0.65ft/s +3% reading)@1.6~64ft/s 25°C, 55%RH, 1013hPa
Response time: typical 2s
Angle dependence: < 3%reading @ | Δα | < 10°
Temperature compensation: 10~40°C
Temp. output(option): range 0~50°C, accuracy <±0.5°C@25°C
Output: 4~20mA(3 wires), 0~10/0~5VDC, RS485/Modbus
Output Load: ≤500Ω(current), ≥2kΩ(voltage)
Display: LCD, with unit m/s or ft/s, DIP switch selectable
Power: 16~28VAC/16~35VDC
Working Environment: -20~70°C, 0~95%RH(Non cond.)
Housing: fire-retardant PC (UL94 V-0)
Protection: IP65
Weight: 440g
Approval: CE

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10 in stock

AVT25111 / Air Velocity Trans, ±(0.2m/s+5% reading), Range 0~5/10/15/20m/s, Probe 210mm, LCD, IP65

497.0 AED

Specifications:

Air velocity sensor: Hot-film sensor
Range: 0~5/10/15/20m/s or 0~16/32/48/64ft/s, jumper selectable
Accuracy: m/s:±(0.2m/s+5% reading) or ±(0.2m/s+3% reading) @0.5~20m/s; ft/s:±(0.65ft/s +5% reading) or ±(0.65ft/s +3% reading)@1.6~64ft/s 25°C, 55%RH, 1013hPa
Response time: typical 2s
Angle dependence: < 3%reading @ | Δα | < 10°
Temperature compensation: 10~40°C
Temp. output(option): range 0~50°C, accuracy <±0.5°C@25°C
Output: 4~20mA(3 wires), 0~10/0~5VDC, RS485/Modbus
Output Load: ≤500Ω(current), ≥2kΩ(voltage)
Display: LCD, with unit m/s or ft/s, DIP switch selectable
Power: 16~28VAC/16~35VDC
Working Environment: -20~70°C, 0~95%RH(Non cond.)
Housing: fire-retardant PC (UL94 V-0)
Protection: IP65
Weight: 440g
Approval: CE

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10 in stock

CDTD Carbon Dioxide (CO2) / Temperature Transmitter

CDTD19 / Duct CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP65, 15 year life

556.0 AED

Specifications:

Carbon dioxide (CO2)
Sensor: NDIR sensor, with ABC algorithm*
Sampling Method: diffusion
Accuracy: (40+3%MV) ppm
Response time(T90): ＜120s (30cc/min, low airflow)
Drift: ＜±10ppm/year
Range: 0~2000ppm (measure range 400~2000ppm)
Output: 4~20mA, 0~10V, RS485/Modbus
Temperature Sensor: Digital, RTD or thermistor, see models
Range: 0~50°C
Accuracy: see accuracy table
Output: 4~20mA, 0~10V, RS485/Modbus or RTD/ thermistor
Power supply: 16~28VAC/16-35VDC
Load resistance: ≤500Ω (Current output), ≥2kΩ (Voltage output)
Display: Optional LCD Display (CDTW)
Display resolution: 1ppm, 0.1°C
Working environment: 0~50°C, 0~95%RH (Non-cond.)
Temp. compensation: 0~50°C
Storage temperature: -20~60°C
Housing material: fire retardant PC(UL94V-0) (CDTW), fire retardant ABS(UL94V-0) (CDTD)

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10 in stock

CDTW Carbon Dioxide (CO2) / Temperature Transmitter

CDTW190 / Room CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP30, 15 year sensor life

538.0 AED

Specifications:

Carbon dioxide (CO2)
Sensor: NDIR sensor, with ABC algorithm*
Sampling Method: diffusion
Accuracy: (40+3%MV) ppm
Response time(T90): ＜120s (30cc/min, low airflow)
Drift: ＜±10ppm/year
Range: 0~2000ppm (measure range 400~2000ppm)
Output: 4~20mA, 0~10V, RS485/Modbus
Temperature Sensor: Digital, RTD or thermistor, see models
Range: 0~50°C
Accuracy: see the accuracy table
Output: 4~20mA, 0~10V, RS485/Modbus or RTD/ thermistor
Power supply: 16~28VAC/16-35VDC
Load resistance: ≤500Ω (Current output), ≥2kΩ (Voltage output)
Display: Optional LCD Display (CDTW)
Display resolution: 1ppm, 0.1°C
Working environment: 0~50°C, 0~95%RH (Non-cond.)
Temp. compensation: 0~50°C
Storage temperature: -20~60°C

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10 in stock

CDTW191 / Room CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP30, LCD, 15 year life

665.0 AED

Specifications:

Carbon dioxide (CO2)
Sensor: NDIR sensor, with ABC algorithm*
Sampling Method: diffusion
Accuracy: (40+3%MV) ppm
Response time(T90): ＜120s (30cc/min, low airflow)
Drift: ＜±10ppm/year
Range: 0~2000ppm (measure range 400~2000ppm)
Output: 4~20mA, 0~10V, RS485/Modbus Temperature
Sensor: Digital, RTD or thermistor, see models
Range: 0~50°C
Accuracy: see the accuracy table
Output: 4~20mA, 0~10V, RS485/Modbus or RTD/ thermistor
Power supply: 16~28VAC/16-35VDC
Load resistance: ≤500Ω (Current output), ≥2kΩ (Voltage output)
Display: Optional LCD Display (CDTW)
Display resolution: 1ppm, 0.1°C
Working environment: 0~50°C, 0~95%RH (Non-cond.)
Temp. compensation: 0~50°C
Storage temperature: -20~60°C

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10 in stock

CMWL110 / Wall Mount CO Trans, 0-300ppm, 0-10Vdc, Life >5 year, IP33

286.0 AED

Specifications:

CO sensor: Electrochemical gas sensor
Sampling Method: Diffusion
Range: 0~100ppm or 0~300ppm
Accuracy: ±5% FS@25°C, typical ±10% FS@5~50°C
Resolution: 1 ppm
Repeatability: <±3%FS
Stability: <±5%/year@0-100ppm, <±10%/year@0-300ppm
Pressure range: standard atmospheric pressure ±10%
Service life: more than 5 years
Response time (T90): < 60s
Warm-up time: < 1 min
Load Resistance: ≤500Ω (current output), ≥2kΩ (voltage output)
Power: Current: 18.5~35VDC (RL=500Ω) 8.5~35VDC (RL=0Ω)
Voltage: 16~28VAC/16~35VDC
Output: 4~20mA (2 wires), 0-10VDC, RS485 / Modbus
Work environment: 5~50°C(continuous), 15~90% RH (Non- cond.)

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10 in stock

CMWL111 / Wall Mount CO Trans, 0-300ppm, 0-10Vdc, Life >5 year, IP33, LCD Display

339.0 AED

Specifications:

CO sensor: Electrochemical gas sensor
Sampling Method: Diffusion
Range: 0~100ppm or 0~300ppm
Accuracy: ±5% FS@25°C, typical ±10% FS@5~50°C
Resolution: 1 ppm
Repeatability: <±3%FS
Stability: <±5%/year@0-100ppm, <±10%/year@0-300ppm
Pressure range: standard atmospheric pressure ±10%
Service life: more than 5 years
Response time (T90): < 60s
Warm-up time: < 1 min
Load Resistance: ≤500Ω (current output), ≥2kΩ (voltage output)
Power: Current: 18.5~35VDC (RL=500Ω) 8.5~35VDC (RL=0Ω)
Voltage: 16~28VAC/16~35VDC
Output: 4~20mA (2 wires), 0-10VDC, RS485 / Modbus
Work environment: 5~50°C(continuous), 15~90% RH (Non- cond.)

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10 in stock

DA050001 / Damper Act On/Off or 3 Point 24V, 5Nm, 2 Aux Sw

229.0 AED

Specifications:

Torque: 5 Nm
Damper size: ≤1 m2(see details in the manual)
Direction of rotation: set by knob
Position indicator: mechanical
Manual override: set by push button
Angle of rotation: max. 95°
Running time: 120s
Connection shaft: circular Φ6~15mm, square 4.5~11mm, min. length 43mm
Control Signal: on/off, 3 pos; 0~10V (input impedance 250kΩ); 4~20 mA (input impedance 200Ω); RS485/Modbus
Internal feedback: 0(2)~10VDC (max. output 1mA); 4~20mA (max. load 500Ω); RS485/Modbus-RTU
Internal switch: 2×SPDT, 0.5A/30VDC
External position switch: 1 or 2, SPDT, 0.5A/250VAC, must be ordered separately, see External Position Switch
Electrical connection: screw terminal
Mode of operation: Type 1 to EN60730-1
Work temp.: -30~50°C, 95%RH, no cond. (EN60730-1)
Storage temp.: -40~80°C
Noise level: ≤35dB
Protection: IP54
Weight: 0.58kg (24V models)
Approval: CE

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606.0001+1001 / Air Diff. Press. Switch, 20-300Pa, silver contact, screw terminal with fixing kit

Specifications:

606.0101+1001 / Air Diff. Press. Switch, 50-500Pa, silver contact, screw terminal with fixing kit

Specifications:

606.0201 +1001 / Air Diff. Press. Switch, 100-1000Pa, silver contact, screw terminal with fixing kit

Specifications:

A2000/C2000 Differential Pressure Gauge

Pre-order via Add to Quote

Specifications:

AVT25101 / Air Velocity Trans, ±(0.2m/s+5% reading), Range 0~5/10/15/20m/s, Probe 210mm, IP65

Specifications:

AVT25111 / Air Velocity Trans, ±(0.2m/s+5% reading), Range 0~5/10/15/20m/s, Probe 210mm, LCD, IP65

Specifications:

CDTD19 / Duct CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP65, 15 year life

Specifications:

CDTW190 / Room CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP30, 15 year sensor life

Specifications:

CDTW191 / Room CO2 Trans, 0-2000ppm with 10K-III NTC Thermistor, 0-10Vdc/4-20mA, IP30, LCD, 15 year life

Specifications:

CMWL110 / Wall Mount CO Trans, 0-300ppm, 0-10Vdc, Life >5 year, IP33

Specifications:

CMWL111 / Wall Mount CO Trans, 0-300ppm, 0-10Vdc, Life >5 year, IP33, LCD Display

Specifications:

DA050001 / Damper Act On/Off or 3 Point 24V, 5Nm, 2 Aux Sw

Specifications:

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