3000SGT series Photohelic ® The switch/meter/transmitter combines several key control functions into one, making it easy to install. This multifunctional instrument uses Dwyer Magnehelic ® The differential pressure gauge can reliably measure low-pressure air, including positive pressure, negative pressure, and differential pressure, with an accuracy of ± 2% at full scale The proven differential pressure gauge can be used for air and compatible gas pressure detection, and provides easy to read analog display on a 4-inch, 800 diameter dial. The pressure gauge can work independently and function normally even in the event of a power outage.

in additionTwo DPDT relays are added for low/high limit control (or as pressure switches), with a rated power of 10A@28VDC Or 120/240VAC. Each set point dead zone is one pointer width - less than 1% FS at full scale; sufficient to ensure correct position and avoid oscillation. The integrated holding coil enables users to connect two DPDTs for separate control of changing dead zones, making it suitable for cleanrooms, positive pressure systems in buildings, heating, ventilation and air conditioning systems, automatic air filters or liquid level control, and other applications. The set point can be freely set within the pressure range by adjusting the knob and red pointer on the panel.

finally, Photohelic ® SGT includes a separate 4-20mA transmitter, with a 2-wire transmitter powered by an external 10-35VDC power supply. There are zero and range adjustments inside the electrical enclosure. A-700 power converter can be selected for converting 100-240V AC voltage input into 24-28V DC output. The transmitter is highly suitable for driving variable speed fans and blowers, shock absorber position control, computer VAV systems, or strip chart recorders for continuous data recording.

In addition to integrating all control functions into one, it can significantly reduce costs and volumeIt is connected by a set of pneumatic pipelines instead of the original three or four sets, thus saving time and materials.

Specifications

Table Specifications

Media: Air and non flammable, compatible gases

Accuracy: see the table below

Pressure range: see the table below

Temperature range:20-120℉(-6.67-48.9℃)

Pressure connection:1/8 "FNPT female thread

Size:4-inch (101.6mm) diameter dial, 5 "(127 mm) O.D. x 8-1/4" (209.55 mm)

Weight:3 pounds 14.5 ounces (1.77kg)

Switch specifications

Switch type: Each contact has2 C-shaped relays (DPDT)

Repeatability: at full scale±1%

Power rating:10A@24VDC 或120VAC, 6A@240VAC

Electrical connection: screw terminal

Power requirements:120VAC, ±10%

Installation orientation: Vertical installationConsult factories in other directions

Setpoint adjustment: Adjust the knob on the panel

Transmitter specifications

Accuracy: see the table below

Temperature range:20-120℉(-6.67-48.9℃)

Pressure range: see the table below

Thermal impact:±0.025% F.S./℉(0.045% F.S./℃)

Power requirements:10.0 to 35 VDC (2-wire)

Output signal:4-20 mA DC

Zero point and range adjustment:Multi turn potentiometer, internal adjustment

Response time:250 Mbps

Loop resistance:0-1250 ohms

Current power consumption: maximum38 mA DC

Circuit connection: junction box

Preheating time:10 minutes

optional- Attachment

TAMP Enhanced Knob: Comes with a wrench key to adjust the set point

A-700 power converter: AC input: 100/120/220/230-240 VAC ± 10%, 47-63Hz, DC output: 24-28 VDC stabilized

A-298: Flat aluminum bracket for 3000SGT

3000SGT 型号