1. Classification by type of antishock:Equipment powered by internal power supply. 2. Classification according to the degree of antielectricshock: it belongs to type B application part. 3. Classification according to the protection degree of harm fulliquid inlet:generalequipment. 4. Classification according tothe safety degree of use in the case of mixture of flammable anesthetic gas and air or mixture of oxygen or nitrous oxide:it belongs to the equipment not suitable for use in the place with flammable anesthetic gas.
Dwyer Model AAFS Adjustable Air Flow Piddle Switch
Minimum Order Quantity
1 Number
Usage/Application
Air Flow Proving in HVAC Systems
Model Name/Number
AAFS
Brand
DWYER. USA
Item Code
Dwyer Model AAFS
Material
Vane: SS; Lever: Brass; Base: Galvanized steel.
Flow Media Type
Gas
Mounting Options
Horizontal duct flow.
I Deal In
New Only
Country of Origin
Made in India
Dwyer Model AAFS Adjustable Air Flow Piddle Switch
MODEL AAFS ADJUSTABLE AIR FLOW PADDLE SWITCH
Ranges From 200 to 1800 FPM,Stainless Steel Vane,ABS Housing
The MODEL AAFS Adjustable Air Flow Switch is Capable of Detecting a Wide Range of Air Velocities With Minimal User Calibration.Quality Features Include a Stainless Steel Vane,Galvanized Steel Base,and ABS Enclosure.
PRODUCT APPLICATIONS
Air Flow Proving In HVAC Systems
MODELS & ORDERING
Model Description
AAFS Adjustable Air Flow Paddle Switch SPECIFICATIONS
The Model VBT-1 Vibration Transmitter continuously detects the vibration in a system and monitors for unusual operating conditions and potential failure. The vibration is converted into an analog signal at the current output. The VBT requires no setup, and there is no software required for configuration. The 2-wire loop power operation, combined with standard M12 micro cable connector and interchangeable mounting studs (1/4″-28 UNF/M8 (2) or the 1/4″-28 UNF), makes for a fast and reliable installation.
Fan Monitoring,Filter Monitoring,Damper Feed Back,Air Handlers
Model Name/Number
Series AVFS Air Flow Switch
Brand
Dwyer USA
Media Type
Gas
Power/Voltage
AVFS-1: 80 to 250 AC/DC (47 to 63 Hz AC). AVFS-2: 24 VDC +-25%.
Material
PBT Body,Titanium Sensor.
Weight
7.2 oz (203 g).
Flow Media Type
Gas
I Deal In
New Only
Country of Origin
Made in India
Series AVFS Air Flow Switch
Monitors Flow in Ducts with Contact Output and Local LED Indication
The Series AVFS Adjustable Air Flow Switch is specifically designed to monitor air flow in ducts and provides a 3 A contact output to indicate a change or loss of flow. The AVFS provides a ±5% set-point repeatability across a full scale range of 1-10 m/s (197-1969 fpm) and includes a mounting bracket for quick duct mounting.
Product Applications
Fan Monitoring
Filter Monitoring
Damper Feedback
Air Handlers
Models & Ordering
Model Description
AVFS-1 Thermo Air Flow Switch, 80-250 AC/DC.
AVFS-2 Thermo Air Flow Switch, 24 VDC.
Specifications
Air Velocity Range:197-1969 FPM (1-10 m/s). Temperature Limits:5 to 122°F (-10 to 50°C). Humidity Limits:0-90% RH. Wetted Materials:PBT Body, Titanium Sensor. Pressure Limit:14.7 psig (1 bar). Housing:PBT. Repeatability:±5% FS. Switch Type:N.O. SPST. Electrical Rating:3 A @ 30 VDC/250 VAC. Response Time:3-60 seconds. Varies With Flow And Set Point. Power Requirement:AVFS-1: 80 to 250 AC/DC (47 to 63 Hz AC). AVFS-2: 24 VDC ±25%. Power Consumption:3 VA. Electrical Connection:6.5′ (2 m) Cable. Enclosure Rating:IP65. Display:1 Red LED/1 Green LED. Weight:7.2 oz (203 g). Agency Approvals:CE.
Features
Integral Red/Green Air Flow Status LED’s
Flush Sensor Design Limits Issues Due To Dust Or Particulate In The Air Flow
Aerosense Differential Pressure Transmitter Series DPT-R8-3W
Series DPT-R8-3W Differential Pressure Transmitter Monitors Pressure The Series DPT-R8-3W Differential Pressure Transmitter is an extremely versatile transmitter for monitoring pressure. The compact package is loaded with features such as 8 selectable ranges, 2 selectable outputs, optional display and optional Auto-Zero feature which electronically adjusts the transmitter zero at predetermined time intervals (every 10 minutes). The Auto-Zero adjustment takes 4 seconds.
The AZ calibration eliminates all output signal drift due to thermal, electronic or mechanical effects. Optional display and Auto-Zero feature available.
SERIES A2 SUBMINIATURE PRESSURE SWITCH Field Adjustable
Designed for OEM applications, the Series A2 Subminiature Pressure Switch is economical and is equipped with high proof pressure capabilities for demanding applications. The A2 is available with either spade terminals or flying leads (submersible). Switches with spade terminals can be easily adjusted in the field. PRODUCT APPLICATIONS
Air and compatible non combustible, non corrosive gasses
Maximum Pressure
2 psi
Thermal Effect
+/- 0.012% FS/ DegreeF
Output Signal
4-20 mA (option)
Operating
-10 Degree to 140 DegreeF (-23 Degree to 60 DegreeC)
The Series A4 digital differential pressure controller is a patented microprocessor based pressure controller for positive, negative, and differential pressure as well as velocity and flow. The Series A4 differential pressure controller includes (2) 8A SPDT relays and an associated programming menu that allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more. The programming is done from a user friendly menu on the OLED display or uploaded using an Opti-Link™ programming key. The OLED also displays the exact setpoints or other user defined variables during normal operation. Furthermore, the menu structure can be customized by moving variables to different menu levels to accommodate many applications. Compared to other mechanical products, the Series A4 digital differential pressure controller has a significantly reduced depth, an improved look, and better performance at a similar price.
The Series A2 digital differential pressure gauge is a patented microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A2 differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A2 is also available with 0.5% or 0.25% accuracy. The A2 digital differential pressure gauge also has an optional 4-20 mA output for applications requiring an output signal. The A2 features a bright ½” LED display and process arch, which gives the gauge improved readability and precision. The A2 digital differential pressure gauges also feature 5 user selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and Pa. The Series A2 offers an improved look, and performance compare to mechanical gauges
Air and compatible non combustible, non corrosive gasses
Maximum Pressure
2 psi
Thermal Effect
+/- 0.012% FS/degF
Output Signal
4-20 mA
Loop Resistance
750 Q max
Response Time
100 ms
The series A3 is a patent pending microprocessor based controller for positive, negative, and differential pressure as well as velocity and flow. The Series A3 includes (2) 8A SPDT relays and an associated software package that allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more. The programming is done from a user friendly menu on the LCD display or uploaded using an Opti Link™ programming key. The LCD also displays the exact setpoints or other user defined variables during normal operation. Furthermore, the menu structure can be customized by moving variables to different menu levels to accommodate many applications. Compared to other mechanical products, the Series A3 has a significantly reduced depth, an improved look, and better performance at a lower price
