Custom Sensors & Technology

What Custom Sensors & Technology does

Custom Sensors & Technology (CST) is a privately held US manufacturer of process analytics instrumentation serving bioprocessing, chemical processing, oil and gas, and industrial laboratory customers. The company's core technology is optical and electrochemical sensing—UV-Vis-NIR photometry, fiber optic spectroscopy (ATR, transmission, front surface fluorescence), and electrochemical oxygen detection—delivered through the PX2 and PX2+ photometric transmitters, a broad family of flow cells (cross-flow, sanitary, long path length, single-use UV-Vis-NIR), fiber optic probes, oxygen transmitters (M85, M87), pressure transmitters and sensors (PT1, PT4, PTL, single-use and reusable), and H2S scrubbers. CST manufactures single-use products in an ISO Class 7 cleanroom using USP Class VI polypropylene, addressing the pharmaceutical and biotechnology industry's need for pre-validated, single-use process analytics consumables in applications such as chromatography, TFF/crossflow filtration, depth filtration, fill and finish, and bioreactor monitoring.

CST operates a direct sales model with custom-quoted, multi-year contract pricing, supplemented by an Application Engineering Service that develops custom sample monitoring systems and accessories for clients with specialized requirements. Revenue is generated through hardware sales of photometric transmitters, sensors, probes, and accessories, plus professional services revenue from custom application engineering. The go-to-market combines the corporate website (customsensors.com), organic social media (Facebook, LinkedIn, Twitter), industry trade shows (notably INTERPHEX in NYC, April 2026), and direct sales-engagement for quoting and technical support. The customer base is enterprise and process-oriented, with bioprocessing as the primary vertical and chemical processing, oil and gas, and broad industrial labs as secondary verticals. No external investors, parent company, or public listing is disclosed, and the company appears to be founder- or privately-held with no recorded funding rounds.

Name

Custom Sensors & Technology

Legal name

Custom Sensors & Technology

Website

https://customsensors.com

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

51–100 employees

Short description

Custom Sensors & Technology (CST) is a privately held US manufacturer of process analytics instrumentation, including UV-Vis-NIR photometers, fiber optic probes, flow cells, oxygen transmitters, and pressure sensors, sold via direct sales to bioprocessing, chemical processing, oil and gas, and industrial laboratory customers.

Ownership category

akta.pro rank

Product category

Process Analytics Instrumentation

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Optical Instruments & Lenses (3827)

akta.pro primary industry

Machine Vision & Optical Sensing (Cameras, 3D vision, LiDAR, illumination) (IMAGAFAB)

akta.pro secondary industries

Industrial-Grade Sensors & Transducer Components (Discrete sensing elements, transducers, MEMS sensors) (IMAGAJAO), Optical & Light Sensors (Photodiodes/ALS/Color/UV) (HDAHALAE)

Keywords

• Process analytics instruments
• Bioprocess sensors
• UV-Vis-NIR photometry
• Fiber optic spectroscopy
• Single-use flow cells

Headquarters

HQ city

Fenton

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Process Analytics Hardware Sales: Sale of photometric transmitters, fiber optic probes, flow cells, oxygen transmitters, pressure sensors, and accessories for industrial process monitoring applications
2. Custom Application Engineering Services: Custom sample monitoring systems and accessories development, product development assistance at various stages

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Custom Sensors & Technology (CST) designs, manufactures, and sells process analytics instrumentation for bioprocessing and industrial applications. Its core offering centers on UV-Vis-NIR photometric transmitters (PX2 and PX2+) supported by a complete ecosystem of fiber optic probes, single-use and reusable flow cells, oxygen transmitters and sensors, pressure sensors and transmitters, and H2S scrubbers. The company also provides a custom Application Engineering Service for developing tailored sample monitoring systems and accessories.

Product overview

Custom Sensors & Technology (CST) offers a comprehensive portfolio of process analytics instrumentation for bioprocessing and industrial applications. The product line centers on the PX2 and PX2+ photometric transmitters (UV-Vis-NIR photometers) as the core analytical platform, complemented by a full ecosystem of sampling and measurement accessories. Key product categories include: (1) Photometric transmitters (PX2+, PX2) for absorbance and fluorescence measurements; (2) Fiber optic probes (ATR, Transmission, Fluorescence) for spectroscopic sampling; (3) Flow cells (Cross Flow, Micro Cross Flow, Sanitary Cross Flow, Long Path Length, EZ-CAL, Single-Use UV-Vis-NIR) for process monitoring; (4) Optical interface couplers for system integration; (5) Oxygen transmitters (M85, M87) and sensors for oxygen monitoring; (6) Pressure sensors and transmitters (PT1, PT4, PTL, Single-Use, Reusable) for pressure monitoring; (7) H2S scrubbers for gas sample preparation; and (8) various accessories including insertion tools, cuvette holders, and fiber optic cables. The products are designed for bioprocessing applications including chromatography, tangential flow filtration (TFF), depth filtration, fill & finish, and general process analytics.

Differentiator

Problem solved

Functional benefit

Products and services

• PX2+ Photometric Transmitter Compact UV-Vis-NIR photometer for single or dual wavelength absorbance or fluorescence measurements; equipped with 3.2 inch capacitive touch LCD, 4-20 mA analog outputs and RS-485 (Modbus) digital output; common wavelengths include 260nm, 280nm, 300nm, 310nm, and 880nm.
• PX2 Photometric Transmitter Photometric transmitter designed for dynamic sensitivity and ease of use; accommodates a combination of measurement methods, light sources, and detectors with 4-20 mA analog and RS-485 (Modbus) communication options and an operating status indicator LED.
• PX2-DIN Photometer DIN-rail mountable variant of the PX2 photometric transmitter for industrial installation environments.
• M85 Oxygen Transmitter Versatile oxygen transmitter that detects oxygen concentration within specified ranges; features 4-20 mA loop powered analog output with power consumption of 0.48 Watts at 24VDC.
• M87 Oxygen Transmitter Oxygen transmitter for oxygen monitoring applications; detects oxygen concentration from ppm to 100% with analog loop resistance of 500 Ohms nominally at 24VDC.
• PT1 Pressure Transmitter Single channel pressure transmitter for measuring dynamic and static pressures of liquids and gases in bioprocessing applications; integrates with Single-Use Process Pressure Sensor via M12 connector with 4-20 mA, Modbus RTU, and TMP outputs.
• PT4 Pressure Transmitter Four channel pressure transmitter for multi-point pressure monitoring in bioprocessing applications; includes 4-20 mA, Modbus RTU, and TMP outputs with optional remote display.
• PTL Pressure Transmitter Pressure transmitter for process pressure monitoring applications.
• Single-Use Process Pressure Sensor Pressure sensor for measuring dynamic and static pressures of liquids and gases for single-use and continuous use bioprocessing applications including TFF, bioreactor pressure monitoring, and depth filtration; integrates via standard M12 connector to PT1 and PT4 transmitters.
• Reusable Process Pressure Sensor Reusable pressure sensor for process pressure monitoring in bioprocessing applications.
• 2400 Series H2S Scrubber Hydrogen sulfide scrubber that selectively removes H2S from gas streams without impacting oxygen concentration; features 38 cm total height, 1.5-2.5 psi pressure drop, 100-500 cc/min flow rate, 125 psi max pressure, and a color-change end-of-life indicator.
• Attenuated Total Reflectance (ATR) Probe Fiber optic probe for Attenuated Total Reflectance (ATR) spectroscopic measurements.
• Transmission Probe Fiber optic probe for transmission spectroscopic measurements.
• Front Surface Fluorescence Probe Fiber optic probe for front surface fluorescence measurements.
• Cross Flow Cell Flow cell for crossflow filtration monitoring applications.
• Micro Cross Flow Cell Compact flow cell for micro-scale crossflow filtration applications.
• Sanitary Cross Flow Cell Sanitary-rated flow cell for crossflow filtration in bioprocessing applications.
• Long Path Length Flow Cell Flow cell with extended optical path length for enhanced sensitivity measurements.
• EZ-CAL Flow Cell Flow cell with integrated calibration capabilities.
• Single-Use UV-Vis-NIR Process Flow Cell Single-use flow cell for UV-Vis-NIR absorbance monitoring in bioprocess applications; manufactured in ISO Class 7 cleanroom from animal and derivative free USP Class VI polypropylene with 10 mm optical path length and either 1/2 inch hose barbs or 1/2 inch sanitary connections; includes a NIST-traceable calibration slot.
• Process Flow Cell Holder Holder for integrating process flow cells into bioprocess monitoring systems alongside disposable flow cells.
• Optical Interface Couplers Optical interface couplers for connecting fiber optic components in measurement setups.
• Micro Optical Interface Couplers Compact optical interface couplers for space-constrained fiber optic measurement applications.
• Oxygen Sensors Oxygen sensors compatible with M85 and M87 oxygen transmitters for oxygen monitoring applications.
• Insertion Tool Tool for inserting sensors into process lines during installation.
• Fiber Optic Cuvette Holder & Standards Cuvette holder and calibration standards for fiber optic measurements.
• Fiber Optic Cables Fiber optic cables for connecting probes and instruments in measurement setups.
• Application Engineering Service Custom application engineering service that develops custom sample monitoring systems and accessories, and assists with various stages of product development for industrial and bioprocessing customers.

Quantifiable outcome

• Single-Use UV-Vis-NIR Process Flow Cell enables monitoring without process shutdown through NIST-traceable calibration slot

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Direct peers

• Repligen: Repligen supplies process analytics and bioprocess solutions including flow cells, spectroscopy sensors, and chromatography systems used in upstream and downstream bioprocessing — directly competing with CST's flow cell and optical sensor portfolio.
• Hamilton Company: Hamilton manufactures process analytics sensors (pH, dissolved oxygen, optical density, viable cell density) for bioprocessing applications — directly competing with CST's PX2+ photometric platform, oxygen transmitters (M85/M87), and pressure sensors in the same single-use bioprocess customer base.
• Mettler-Toledo Thornton: Mettler-Toledo Thornton provides process analytical instruments for pharmaceutical and biotech manufacturing, including UV-vis and conductivity sensors for chromatography, TFF, and fill-finish — overlapping directly with CST's photometric transmitter and bioprocess application focus.
• optek (Halma): optek specializes in inline process analytics including UV-Vis-NIR absorbance and color/Haze sensors for chemical, pharmaceutical, and food applications — a direct technical peer to CST's UV-Vis-NIR photometry platform with overlapping spectroscopy use cases.

Broad incumbents

• Cytiva: Cytiva (formerly GE Healthcare Life Sciences) supplies bioprocess solutions including bioreactors, filters, chromatography, and process analytics for pharma/biotech manufacturing — overlapping with CST's bioprocess customer base but at much broader scale.
• Emerson (Rosemount): Emerson's Rosemount division offers a broad range of process instrumentation including pressure, temperature, and analytical sensors used in chemical, oil & gas, and pharmaceutical industries — competing with CST's industrial instrumentation breadth across multiple verticals.
• Sartorius: Sartorius is a major bioprocess equipment and consumables supplier offering sensors, filters, and process analytics for pharmaceutical manufacturing — competing with CST in bioprocess monitoring while operating at significantly larger scale and breadth.
• Endress+Hauser: Endress+Hauser is a global industrial process instrumentation leader offering pH, oxygen, conductivity, turbidity, and photometric sensors across many industries — competing with CST in process analytics but with a much broader portfolio and global footprint.
• Parker Hannifin (domnick hunter): Parker's domnick hunter division provides process filtration and analytical instruments for bioprocessing and pharmaceutical manufacturing, including gas and liquid sensors — overlapping with CST's bioprocess instrumentation focus but as part of a much larger industrial portfolio.

Emerging players

• FlowCam (Yokogawa Fluid Imaging Technologies): FlowCam provides imaging-based particle analysis and process analytics for bioprocessing and industrial applications — an emerging player in bioprocess analytical instrumentation that competes with CST's optical-based monitoring approaches in select use cases.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/customsensors
• Facebookfacebook.com/pages/Custom-Sensors-Technology/1486414298290941
• LinkedInlinkedin.com/company/custom-sensors-&-technology

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Custom Sensors & Technology