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Incorporated with an advanced U-shaped tube sensor, this controller is constructed of aluminum and brass for non-corrosive gases or 316 stainless steel for corrosive applications. In addition, this controller has a built-in electromagnetic valve that allows the flow to be set to any flow rate within the range.
Features
Principles of operation
Metered gases are divided into two laminar flow paths, one through the primary flow conduit, and the other through a capillary sensor tube. Both flow conduits are designed to ensure laminar flows and therefore the ratio of their flow rates is constant.
Two precision temperature sensing windings on the sensor tube are heated, and when flow takes place, gas carries heat from the upstream to the downstream windings. The resultant temperature differential is proportional to the change in resistance of the sensor windings.
A wheatstone bridge design is used to monitor the temperature dependent resistance gradient on the sensor windings which is linearly proportional to the instantaneous rate of flow.
Output signals of 0 to 5 V DC and 4 to 20 mA are generated indicating mass molecular based flow rates of the metered gas. The combined gas streams flow through a proportionating electromagnetic valve with an appropriately selected orifice. The closed loop control circuit continuously monitors the mass flow output and maintains it at the set flow rate.
Flow rates are unaffected by temperature and pressure variations within stated limitations.
Applications
| Accuracy | ±1% of full scale |
| Calibration | Performed at standard conditions [14.7 psia (101.4 kPa) and 70°F (21.1°C)] unless otherwise requested |
| Repeatability | ±0.5% of full scale |
| Response Time | 300 ms time constantApproximately 1 second to within ±2% of set flow rate for 25% to 100% of full scale flow |
| Coefficient | Temperature 0.15% of full scale/°CPressure: 0.01% of full scale/psi (0.07 bar) |
| Gas Pressure | Optimum: 25 psig (1.73 bar)Maximum: 1000 psig (70 bar) |
| Turn Down Ratio | 40:1 |
| Maximum Pressure Difference | 50 psi (3.4 bar) |
| Gas and Ambient Temperature | 32 to 122°F (0 to 50°C) |
| Leak Integrity | 1 x 10 to 9 smL/second of helium maximum to the outside environment |
| Materials Fluid Contact | Anodized aluminum, 316 stainless steel, brass & Viton O to rings |
| Attitude Sensitivity | No greater than ±15° rotation from horizontal to vertical |
| Signals | Output:Linear 0 to 5 V DC (1000 Ω minimum load impedance)4 to 20 mA (0 to 500 Ω loop resistance)Maximum noise ±20 mVCommand Signals:Analog 0 to 5 V DC4 to 20 mA for remote set point modeNPN compatible purge/valve off |
| Connections | ¼" (0.635 cm) compression fittings Tube O diameter |
| Transducer Input Power | Universal +12 V DC to 26 V DC, 650 mA maximum |
| Circuit Protection | Circuit boards have built-in polarity reversal protectionResettable fuses provide power input protection |
| Display | 3½ digit LCD0.5" (1.27 cm) high characters |
| CE Compliant | EN 55011 class 1, class B; EN50082-1 |
| Dimensions | 5.72 x 6.29 x 1" (14.53 x 15.98 x 2.54 cm) |
Everything you need to know about orders, cancellations, refunds, and delivery.
EquipTestPro ships to both Canada and the United States. We are pleased to serve customers across North America with reliable, trackable delivery options.
When you place an order, a flat-rate shipping charge will be applied at checkout based on your order. The applicable rate will be clearly displayed before you complete your purchase.
Flat-rate shipping is calculated to reflect the cost of reliable, insured delivery. The rate shown at checkout is final — no hidden surcharges will be added after your order is placed.
For certain items, shipping costs are calculated based on the weight of the product. The weight of any weight-based item is listed on its product detail page.
For example, an item weighing 3.2 lbs will be rated at 4 lbs for shipping calculation purposes. This policy is standard practice across all major carriers we work with.
Some products sold on EquipTestPro are subject to shipping restrictions due to regulatory, carrier, or safety requirements. These include but may not be limited to:
Where restrictions apply, this will be clearly noted on the product listing. If you have questions about a specific product's shipping eligibility to your location, please contact us before placing your order.
Orders are processed on business days (Monday through Friday, excluding statutory holidays). Orders placed after business hours or on weekends will begin processing the following business day.
You are entitled to cancel your Order within 30 days of receipt without providing a reason, subject to the processing fee structure described below.
The cancellation deadline is 30 days from the date on which you received the Goods, or on which a third party appointed by you (other than the carrier) takes possession of the delivered product.
To exercise your cancellation right, notify us with a clear written statement by:
The following fee structure applies to all cancellations. Please review carefully before requesting a cancellation.
A processing fee of 10% of the total order value will be withheld from your refund to cover payment processing, handling, and administrative costs.
If we cancel your order due to item unavailability, no processing fee will be withheld. You receive a full refund of the amount paid.
Refunds will be issued using the same payment method as the original purchase. No additional fees beyond those described above will be applied.
To be eligible for a return, all of the following conditions must be met:
We reserve the right to refuse returns of any merchandise that does not meet the above conditions, at our sole discretion.
The following items are not eligible for return under any circumstances:
You are responsible for the cost and risk of returning Goods to us. Before sending any items, please contact us at info@equiptestpro.com to obtain the return shipping address.
You should expect to receive your refund within four (4) weeks of delivering your return package to the shipper. In many cases, refunds are processed sooner. The timeline breaks down as follows:
We will process refunds no later than 14 days from the day we receive the returned Goods, using the same payment method as your original purchase.
If the Goods were marked as a gift at the time of purchase and shipped directly to you, a gift credit equal to the return value (less any applicable processing fee) will be issued. Once the returned product is received and inspected, a gift certificate will be mailed to you.
If the Goods were not marked as a gift at purchase, or if the gift giver had the order shipped to themselves first, the refund will be issued to the original purchaser.
Reach out to our support team for assistance with any order or return.
Not Applicable
| Condition: | NA |
Defective new equipment may be returned for warrantyrepair/exchange to us within (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to repair charge.
Non defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returnsin which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.
(Do not write anytingon the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.)
Please, include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty (30) days.
