Rheonics Support

What products are involved?
Rheonics Inline Density and Viscosity Meter SRD

What is the purpose of this article?
To give an overview of the Slimline Probe - SLP (-X6) version of the SRD sensor and installation information.

1. Overview

The slimline probe (SLP) design for the SRD sensor is a long insertion probe with a body diameter of 19mm, which is the main difference from a standard long insertion sensor (-X5)  that has a 30mm diameter. Its order code is -X6.

This 19mm diameter body opens up the possibility of using more process connections of smaller sizes. This is well suited for installations in small lines, tanks or vessels, and bioreactors or reactors where available connections are small and the standard long insertion probe does not fit (due to the 30 mm diameter). The slim design also creates small pressure drops in smaller ID lines.

Some connections suitable for the SRD-X6 are  1” NPT, 3/4” NPT, Ingold, Tri-Clamp, and others. 

The SRD-SLP (-X6) is a long insertion probe so the insertion length A and process connection B should be defined by user upon order.

Figure 1: Slimline SRD-X6 dimensions

With the Slimline Probe there are many installation advantages. Some installation scenarios of this sensor variant are:

• Installation in small pipelines (e.g. 3/4“, 1”, 1.25” ID pipes)
• Installation with small process connections: Ingold DN25, 1” NPT, 3/4” NPT.
• Installation in reactors and bioreactors
• Installation in pipe with less effect on the cross section reduction inside the pipe (compared to -X5 sensors as shown in next figure) → low/no pressure drop

Figure 2: SRD Slimline Probe comparison with SRD-X5 mm [in.]

2. Installation principles

The Rheonics density and viscosity meter SRD-X6 is based on the same resonator used for other SRD variants. So the installation requirements are the same for all SRD sensors. Next image shows the basic installation criterias.

Figure 3: SRD-X6 Slimline sensing area

3. Configuration examples

The SRD-X6 Slimline probe can be configured with customizable insertion length and process connection. Some configuration examples are listed below.

• 3/4” NPT Thread: Common NPT thread also available in short variant SRD-X1-34N. Rheonics offers 3/4" NPT weldolet for installation. Connection code is -B34N. Smaller threads are available as long as they can be welded on the 19mm OD body.

Figure 4: Slimline SRD-X6 3/4” NPT mm [in.]

• Ingold DN25: It is mostly used in reactor applications. Process connection code is -BI25. Review more about this configuration here.
  

Figure 5: Slimline SRD-X6 Ingold DN25 mm [in.]

• Tri-Clamp D34: Tri Clamp is used in hygienic installations for food, pharmaceutical and other industries. The SRD-X6 can be ordered with Tri Clamp sizes from ∅34 mm (equivalent to ISO 1127 DN20) up. Process connection code for D34 is: -B34T.

Figure 6: Slimline SRD-X6 TC D34 mm [in.]

• DIN 11851 Sanitary DN 40: This connection is mostly used for hygienic applications and easy disassembly. Common in food and beverage industries. Process connection code is: -BH40.

Figure 7: Slimline SRD-X6 Hygienic DIN 11851 DN40 mm [in.]

4. Installation examples

Installation in Elbow Pipe: An installation in an elbow with the fluid flowing past the sensing element axially is often a recommended scenario. The SR-SLP variants are well suited for this installation since their ∅19mm diameter allows a minimum pressure drop in line.

Figure 8: Slimline SRD-X6 double jacketed elbow installation mm [in.]

Installation in small reactor: Small metal or glass reactors can have limited space and requires the use of small process connections. The SRD-X6 can be used in these conditions to measure density, viscosity and temperature inline as in the next example, using an Ingold DN25 connection for installation on the lid. We do not recommend use or SRD_SLP probes when bubbles and inhomogenity is expected in the fluid due to the mixing stator or fluid conditions. Seek advise from Rheonics Application Engineering team on your fluid and application if you expect to use the sensors where fluid or operational conditions can cause bubbles in flow or inhomogenity due to movement of fluid.

Figure 9: Slimline SRD-X6 glass bioreactor installation example

5. How to order the Rheonics Slimline Probe?

How to Order Rheonics long insertion density and viscosity meter
1	Rheonics SR-Type sensor SRD: Inline Density and Viscosity meter SRV: Inline Viscometer	3	Insertion Depth - “A” Defined by client. Distance from sensor conencton to sensor tip. Probe wetted zone.
2	Process Connection Configuration X6: Slimline Probe Variant - SLP. Probe variant with ∅19 mm body.	4	Process Connection "B"  Defined by client. Common connections are: 3/4” NPT, 1” NPT, Tri Clamp DN34, 1.5”, G 1”. Ask Rheonics Sales Team for availability of connections. Some codes defined by Rheonics: B34N: 3/4” NPT  B11N: 1” NPT  B15T: 1.5” Tri Clamp
The appropriate  RFQ page for SRD density and viscosity meter should be used to configure other options of the sensor, like viscosity range, calibration accuracy, pressure rating, etc.

References:

[1]: Ingold Process Analytics

[2]: Rheonics SRD » Density Meter inline online specific gravity concentration 

[3]: SRD Density Meter Installation 

[4]: Rheonics whitepapers: Viscometer and density meter