The Series IS/PX/TX Insite™ Air/Liquid In-Line Flowmeter is available in a variety of materials including PVC, Aluminum, Brass, or 316 stainless steel. The variety of optional materials allows the flowmeters to be used in many different applications. The Series INSITE Flowmeters are also available with an optional field adjustable reed switch for high and low alarms. To learn more about the Series IS/TX/PX INSITE™ Flowmeter, please visit the Dwyer website at: https://www.dwyer-inst.com/Product/SeriesIS-PX-TX

1. Series IS/TX/PX
INSITE™
Inline Variable Area
Flowmeters
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2. Series IS/TX/PX INSITE™
Flowmeters
General Information
● What is it?
○ Multiple series of inline variable area flowmeters that provide visual indication of flow rate of a
variety of applicable liquids and gases compatible with the specified wetted material.
■ 1/2” to 1-1/2” Port/Connection
■ 3 to 50 GPM (20 to 200 LPM)

3. Series IS/TX/PX INSITE™
Flowmeters
Applications
● Series IS | Polysulfone tube and piston flow indicator with 316 SS spring and shaft with PVDF, aluminum,
brass or 316 SS fittings
○ Deionized water, ultra pure, and water applications
● Series TX | PVC tube and piston flow indicator with Titanium spring and shaft with PVC fittings
○ Municipal, industrial, and water & wastewater applications
● Series PX | PVC tube and piston flow indicator with aluminum, brass , 316 SS and PVC fittings
○ Cooling water, process water, weld water, compressed air and nitrogen applications
Cooling Water, Air/Nitrogen
Water & Wastewater
Deionized Water

4. Series IS/TX/PX INSITE™
Flowmeters
Key Benefits / Features
● Spring and piston design
○ Mount units in any orientation and position increasing application flexibility
● 4 psi ( 0.28 bar ) maximum pressure drop at full scale flow
○ Conserves pump energy needed to maintain desired process flow
● Clear transparent tube
○ Cost effective solution with full fluid visibility to visually monitor process fluid
● Direct reading flow scales in English & Metric
○ Saves time and reduce error with direct flow reading
● Optional factory supplied or field installed switches
○ Allows for alarm, high, low indication for additional application flexibility

5. Series IS/TX/PX INSITE™
Flowmeters
Accessories
Switch Options
Purchased as integrated
option or as an accessory
that is field installed.
Single and double switch kits
with viton options.
Integrated Switch Options
-IS1, -IS2, -IS1T, -IS2T
Accessory Switch Options
ISS-15-B, ISS-50-B,
ISS-15-B-T, ISS-50-B-T

6. ● Fluid moves the piston against the spring enough to pass a given flow around the piston periphery
● The edge of the piston is visible through the transparent tube
● Its position is read from a printed scale on the tube
Series IS/TX/PX INSITE™
Flowmeters
Operation

7. Series IS/TX/PX INSITE™
Flowmeters
Key Specifications
● Service: Compatible liquids and gases
● Wetted Materials: Flow tube and piston: PVC or polysulfone; Fittings: Aluminum, brass, 316
stainless steel, or PVC; Seal/O-rings: Viton
● Temperature Limits: Up to 210°F (99°C) [model dependent]
● Pressure Limits: Up to 200 psig (13.8 bar) [model dependent]
● Accuracy: ±5% FS
● Repeatability: ±1% FS @ 70°F ±2°F (21.1°C) and 14.7 psia (in line connection rating only)
● Process Connections: Selectable 1/2" (12.70 mm), 3/4" (19.05 mm), 1" (25.40mm), or
1-1/2”(38.10mm) female NPT
● Scale Length: 4" (101.6 mm) [model dependent]
ADDITIONAL SPECIFICATIONS:
● Switch Type: Optional 3-wire reed switch
● Electrical Rating: 0.3 A @ 120 VAC/100 VDC

8. Series IS/TX/PX INSITE™
Flowmeters
Additional Information
● You can find more information on this product by visiting our website
www.dwyer-inst.com
● For any technical questions you may have, we have several Applications Engineers available by
phone or email at:
○ (219) 879-8868 ext. 6402
○ tech@dwyermail.com
● To request a quote or place an order, you can contact one of our Customer Service Representatives
at:
○ (219) 879-8868 ext. 6656
○ quotes@dwyermail.com
○ orders@dwyermail.com

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