DH Series Digihelic® Differential Pressure Controller
product manual:
Three-in-one differential pressure gauge, switch, and transmitter, which can directly output the wind speed signal
The DH series Digihelic® differential pressure controller is a three-in-one product that combines digital differential pressure gauges, differential pressure switches and differential pressure transmitters. It combines multiple functions into one, which can reduce inventory and save installation time. And cost. Digihelic® differential pressure controllers are best suited for applications that monitor wind pressure, speed, and volume with an accuracy of 0.5% and a range from 0.25 to 100 inches of water.
Digihelic® differential pressure controller can select various engineering units such as pressure, wind speed and volume on site. Two single-pole double-throw switches with adjustable hysteresis, can be range shifted corresponding to 4-20mA, and adopt linear linear output when measuring wind speed or volume. The DH series is extremely flexible in the use of power. The power supply can use 120 / 220VAC, or the 24VDC power supply commonly used in the control room.
Use menu buttons to programmatically configure various functions: safety level selection; wind pressure and air speed selection; engineering unit selection; pitot tube K-factor selection; rectangular or circular tube selection; set point and alarm selection; high, low or high / Low alarm setting; automatic or manual reset; alarm delay; viewing peak and valley values; digital damping adjustment; range shift; Modbus® communication and field calibration, etc.
It aggregates all functions into one product and can be used in all differential pressure monitoring applications, which is why the DH series is your only choice.
Product parameters:
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Housing Material: ABS plastic, UL approved 94 V-0.
Accuracy: ± 0.5% at 77 ° F (25 ° C) including hysteresis and repeatability.
Stability: <± 1% per year.
Pressure Limits: Ranges ≤ 2.5 in w.c. = 2 psi; 5 ": 5 psi; 10": 5 psi; 25 ": 5 psi; 50": 5 psi, 100 ": 9 psi.
Temperature Limits: 32 to 140 ° F (0 to 60 ° C).
Compensated Temperature Limits: 32 to 140 ° F (0 to 60 ° C).
Thermal Effects: 0.020% / ° F (0.036 / ° C) from 77 ° F (25 ° C).
Power Requirements: High voltage power = 100 to 240 VAC, 50 to 400 Hz or 132 to 240 VDC. Low voltage power = 24 VDC ± 20%.
Power Consumption: Low voltage power = 24 VDC-130 mA max;
High voltage power = 100 to 240 VAC, 132 to 240 VDC-7VA max.
Output Signal: 4-20 mA DC into 900 Ω max.
Zero & Span Adjustments: Accessible via menus.
Response Time: 250 ms.
Display: 4 digit LCD 0.4 "height. LED indicators for set point and alarm status.
Electrical Connections: Screw terminals.
Process Connections: Compression fitting for use with 1/8 "ID X 1/4" OD tubing (3.175 mm ID x 6.35 mm OD). Optional barbed fitting for 3/16 "ID tubing.
Enclosure Rating: Face designed to meet NEMA 4X (IP66).
Mounting Orientation: Mount unit in horizontal plane.
Size: 1/8 DIN.
Panel Cutout: 1.772 x 3.620 in (45 x 92 mm).
Weight: 14.4 oz (408 g).
Serial Communications: Modbus® RTU, RS485, 9600 Baud.
Agency Approvals: CE, UL.
SWITCH SPECIFICATIONS
Switch Type: 2 SPDT relays.
Electrical Rating: 8 amps at 240 VAC resistive.
Set Point Adjustment: Adjustable via keypad on face.
• Duct air volume
• Industrial oven airflow
• Filter status
• Clean room differential pressure
• Air cabinet airflow
• Infirmary pressure
• Static pressure in pipes or buildings
• damper control
• Fan control

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.