PROBES FOR DIFFERENT APPLICATIONS

Equitech manufactures over 10 different contact and non-contact probes, which can measure solids, liquids, slurries, pastes, polymer melts, and gases. They are specially designed to access difficult entry points and to withstand harsh environmental conditions. 

Reflection Polymer Melt Probe (RPMP)

Objective

Built specifically for color measurement in extruded thermoplastics applications, this fiber optic reflection probe combines illumination with detection to measure reflected light and precisely monitor color.

Characteristics

  • Six illumination fibers are evenly spaced around the probe circumference
  • Illumination fibers are angled at 28 degrees from the surface normal
  • The reflected light is picked up by a single fiber at 0 degrees from the normal

Benefits

Inline color measurement of opaque materials directly in the extrudate.


Technical Information

  • Sensing Region Max point sensitivity = between 0 and 0.5mm
  • Lens/Window Material = Sapphire
  • Numerical Aperture = 0.22 NA
  • Spot size = 1mm
  • Optical Fiber Type: NIR 6-(400 microns) fibers around 1- (400 microns) fiber*
  • Fiber Packaging: Teflon® – coated (220°C) armored fiber bundle
  • Fiber Length: 5 m standard*
  • Fiber Termination: SMA 905

Physical Information

  • Mounting = ½-20 UNF w/5.715mm (0.225”) well depth
  • Body & Materials = 316 SS w/titanium tip
  • Body Dimensions = 165.1mm (6.5”) length; tip length 5.436mm (0.214”)
  • Seal Type = Sapphire to metal
  • Seal Material = Sapphire / Titanium
  • Temperature Range = -20° to 400°C (500°C available)
  • Maximum Pressure = 345 bar (5000 psi)

* Other fiber sizes and lengths available upon request

** Other materials available upon request

RPMP in use


Transmission Polymer Melt Probe (TPMP)

Transmission Polymer Melt Probe

Objective

Built specifically for color measurement in extruded thermoplastics applications, these 2 fiber optic reflection probes combine illumination (coming from one of the probes) with detection (on the second probe) to measure transmitted light and precisely monitor color.

Characteristics

  • One of those probes has six illumination fibers are evenly spaced around the probe circumference
  • Illumination fibers are angled at 28 degrees from the surface normal
  • The transmitted light is picked up by a single fiber at 0 degrees from the normal on the second probe

Benefits

Inline color measurement for translucent materials directly in the extrudate

Technical Information

  • Sensing Region Max point sensitivity = between 0 and 0.5mm
  • Lens/Window Material = Sapphire
  • Numerical Aperture = 0.22 NA
  • Spot size = 1mm
  • Optical Fibers Type: NIR 6-(400 microns) fibers around 1- (400 microns) fiber*
  • Fibers Packaging: Teflon® – coated (220°C) armored fiber bundle
  • Fibers Length: 5 m standard*
  • Fibers Termination: SMA 905

Physical Information

  • Mounting = ½-20 UNF w/5.715mm (0.225”) well depth
  • Body & Materials = 316 SS w/titanium tip
  • Body Dimensions = 165.1mm (6.5”) length; tip length 5.436mm (0.214”)
  • Seal Type = Sapphire to metal
  • Seal Material = Sapphire / Titanium
  • Temperature Range = -20° to 400°C (500°C available)
  • Maximum Pressure = 345 bar (5000 psi)

* Other fiber sizes and lengths available upon request

** Other materials available upon request

TPMP in use


Transmission Cell

Objective

Built specifically for use in an industrial process environment, this fiber optic probe is rugged enough to operate at temperatures ranging from -30°C to 260°C and at pressures up to 207 bar (3000 psi.).

Characteristics

  • Cell has a sending and a receiving lens
  • Process liquid flows between the two lenses
  • The Cell is plumbed into the process or a sampling loop
  • Kalrez® O-rings provide the lens and compression fitting seals

Benefits

Inline color and chemical concentration measurements of transparent liquids in pilot plants, vessels, and reactors where high pressures and temperatures devastate precision monitoring equipment.

Technical Information

  • Path Lengths = 2, 5, 10, 20, 50 & 100 mm
  • Lens/Window Material = UV or NIR fused silica*
  • Numerical Aperture = 0.22 NA
  • Efficiency = Typical 50% at 500 nm; Guaranteed: 40% at 500 nm**
  • Optical Fiber Type = UV or NIR 400/440 silica on silica
  • Fiber Packaging = PVC-coated (80°C) armored simplex
  • Fiber Length = 5 m standard***
  • Fiber Termination = SMA 905

Physical Information

  • Body Materials = 316 SS*
  • Body Dimensions = 38.1 mm (1.5”) Path Length / 2 x 12.7 mm (0.5”) OD
  • Extension Tube Dimensions*** = 2” Length x 0.5” OD
  • Seal Type = O-ring
  • Seal Material = Kalrez® 6375*
  • Temperature Range -30°C to 260°C
  • Maximum Pressure = 207 bar (3000 psi)
  • Liquid Flow Path: Straight through (path length <10 mm); “Z” configuration (path length ≥10 mm)
  • Process Connections = ¼” compression fitting

* Other materials available upon request

** Efficiency measured relative to fiber connection between the light source and detector using 400-micron core fibers and inline adapter

*** Other fiber sizes and/or lengths available upon request

Transmission Cell Probe in use


Large Area Surface Probe

Objective

Built specifically for color measurement over large surfaces, this fiber optic probe combines illumination with detection to measure reflected light and precisely monitor color.  The sophisticated design features built-in rejection of specular reflections off glossy surfaces and insensitivity to the embossing of the product.

Characteristics

  • A built-in xenon flash lamp illuminates the sample 0 degrees from the surface normal
  • Seven detection fibers spaced evenly around the probe are positioned at 45-degree angles from the surface normal to detect reflected light
  • The second set of circumferential fibers detect reflected light from an internal white surface that serves as a real-time compensation channel for the source lamp

Benefits

Inline color measurement of materials with large surface areas illuminates and measures reflected light while ignoring the brightness of glossy surfaces.

Technical Information

  • Sensing Region = Max. Sensitivity @ 25.4mm +/- 2.54mm
  • Lens/Window Material = Borosilicate glass
  • Spot size = 19.05mm (0.75”) diameter
  • Optical Fiber Type = NIR two bundles of 7 fibers around 1 fiber 200/220 silica on silica*
  • Fiber Packaging = PVC-coated (80°C) armored fiber bundle Teflon® – coated (220°C) armored fiber bundle
  • Fiber Length = 5 m standard*
  • Fiber Termination = SMA 905
  • Source = Xe flash (3-ms flash period)
  • Standoff distance = 25mm

Physical Information

  • Body Materials = Aluminum
  • Space Requirements = 135.38mm Length x 82.55 mm Width x 317.5mm Height (5.33” L x 3.25” W x 12.5” H)
  • Temperature Range 0°C to 50°C
  • Maximum Pressure = 1.0143 bar (14.7 psi) 
  • Energy = 24 V DC supplied by IPS via 9 pin D subminiature connector

* Other fiber sizes and lengths available upon request

LASP in use


Diffuse Reflectance Probe

Diffuse Reflectance Probe - Middle bottom

Objective

Ideal for color measurement in liquids of any kind.  This fiber optic probe can be immersed in pressurized tanks to measure color directly in pigment dispersions such as those encountered in paints, inks, and coating materials.

Characteristics

  • Six illumination fibers are evenly spaced around the probe circumference
  • Illumination fibers are angled at 45 degrees from the surface normal
  • Reflected light is picked up by a single fiber at 0 degrees from the normal

Benefits

Inline color measurement directly in liquids, pastes, slurries, or wet samples by direct contact.

Technical Information

  • Sensing Region = Contact to 2mm
  • Sensitivity to Specular Reflection = < 0.2%
  • Lens/Window Material = Sapphire
  • Numerical Aperture = 0.22 NA
  • Spot Size = 1.5mm
  • Optical Fiber Type = UV or NIR 6-around-1 400/400 silica on silica
  • Fiber Packaging = PVC Coated (80°C) armored fiber bundle
  • Fiber Length = 5 m standard*
  • Fiber Termination = SMA 905
  • Fiber Packaging = PVC-coated (80°C) armored duplex
  • Standoff Distance = Contact

Physical Information

  • Body Materials = 316 SS**
  • Body Dimensions = 152mm Length; 19 mm OD (6” L x 0.75” OD)
  • Seal Type = Sapphire to metal
  • Temperature Range -20°C to 260°C
  • Maximum Pressure = 2000 psi (135 atmospheres, 138 bar)

* Other fiber sizes and/or lengths available upon request

** Other materials available upon request

Diffuse Reflectance Probe in use


ATR Probe

ATR Probe

Objective

Built specifically for measurement in chemical applications, this fiber optic transmission probe combines illumination with detection to measure transmitted light in liquids with a very high optical density.

Characteristics

  • Seven illumination fibers are located on the probe circumference
  • Illumination fibers inject light into the flat face of the ATR crystal
  • Seven detection fibers pick up the transmitted light on the opposite side of the probe circumference

Benefits

Inline concentration measurement of highly absorbing liquids directly in the process.

Technical Information

  • Three bounce design; Path length ~1.5 microns***
  • Sensing Region:  1-mm spot at each bounce location
  • Lens/Window Material = Sapphire**
  • Maximum sample index of refraction = 1.5
  • Sample optical density: 50 – 1000 at 1 mm path length
  • Optical Fiber Type: UV 6-(200 microns) fibers around 1- (200 microns) fiber
  • Fiber Packaging:  PVC-coated (80°C) armored duplex
  • Fiber Length: 5 m standard*
  • Fiber Termination: SMA 905

Physical Information

  • Body & Materials = 316 SS**
  • Body Dimensions = 247.7 mm (9.75”) length; 12.7 mm (0.5”) diameter
  • Seal Type = O-ring
  • Seal Material = Kalrez® 6375**
  • Temperature Range -20°C to 260°C
  • Maximum Pressure = 1200 psi (83 bar)

* Other fiber lengths available upon request

** Other materials available upon request

*** Path length is a function of the index of refraction of the sample and the crystal, as well as the temperature


Retro Reflection Probe

Retro reflection probe

Objective

Built specifically for use in an industrial process environment, this fiber optic probe is rugged enough to operate at temperatures ranging from -30°C to 260°C and at pressures up to 206 bar (3000 psi.).

Characteristics

  • The probe has a back-reflecting aluminum mirror for high light return at UV wavelengths
  • The aluminum layer is back-coated on a silica disk with a protective MgF2 overcoat
  • The mirror is sealed into the bottom of the probe
  • The mirror and the collimating lens are held in the steel housing with Kalrez® O-rings

Benefits

Inline color and chemical concentration measurements directly in fast-moving liquids and gases in pilot plants, vessels, and reactors where high pressures and temperatures devastate precision monitoring equipment.

Technical Information

  • Path Lengths = 2, 5, 10, 20 & 50mm
  • Lens/Window Material = UV or NIR fused silica**
  • Numerical Aperture = 0.22 NA
  • Reflector Material = Back surface Al / silica**
  • Efficiency = Typical 30% at 500 nm; Guaranteed: 20% at 500 nm***
  • Optical Fiber Type = UV or NIR 400/440 silica on silica***
  • Fiber Packaging = PVC-coated (80C) armored duplex Teflon-coated (260C) armored duplex
  • Fiber Length = 5 m standard*
  • Fiber Termination = SMA 905

Physical Information

  • Body Materials = 316 SS**
  • Body Dimensions = 38.1 mm (1.5”) Path Length / 2 x 12.7 mm (0.5”) OD
  • Extension Tube Dimensions**** = 4” Length x 0.5” OD
  • Seal Type = O-ring
  • Seal Material = Kalrez® 6375**
  • Temperature Range -30°C to 260°C
  • Maximum Pressure = 207 bar (3000 psi)

* Other fiber lengths available upon request

** Other materials available upon request

*** Efficiency measured relative to direct fiber connection between the light source and the detector using 400-micron core fiber optic

**** Custom Lengths up to 1m available