Environmental Monitoring Instruments, Built for Compliance Reporting
Stack samplers, flue gas analyzers, ambient air monitors, VOC and fuel vapour systems, water analyzers and optical sensor modules — configured to your method, your gas and your output protocol, and supported from the factory to your laboratory.
Request a Quote
See the method reference
The difference is in the specification, not the badge
Most suppliers will quote an instrument to meet your headline requirement. We specify the instrument to meet your method, and then show you the numbers.
Accuracy stated with its conditions
Every specification on this site lists the full measurement conditions — range, ambient temperature, compensation mode, gas and response time. We do not publish a bare “±1% FS” without the context that makes it meaningful. If a competitor’s datasheet omits those conditions, ask both of us for the same test and compare.
Method equivalence, documented
Our instruments are built against EPA, European and Chinese method frameworks. Where the requirements differ, the Standards & Methods reference states the difference explicitly rather than leaving you to find it after delivery.
Configurable before it is custom
Measurement range, pump flow, probe type, gas configuration, sampling volume, output protocol and data storage are selected at order. You are not forced into a fixed-SKU compromise, and you are not quoted a bespoke price for a standard configuration.
The consumables are published
Filter membranes, filter cores, absorption solutions and wearing parts are listed with part numbers and typical service life, so you can budget the five-year cost of ownership before the instrument arrives.
Eight product families
Volatile Organic Compound Monitoring11 modelsvoc-samplers · Total Hydrocarbon & Methane · Portable Gas Detection
Environmental Air Monitoring16 modelspm-monitor · Ambient Air Samplers · Gas Analyzers
Gas Station and Vehicle Exhaust Monitoring3 modelsfuel-vapour-recovery · Vehicle Exhaust
Water Quality Monitoring8 modelscod-analyzers · Sample Preparation · Precipitation Sampling
Calibrator Series7 modelsflow-calibration · Gas Mixing & Reference · Odorimetry
Sampling Probes and Accessories8 modelspreprocessing · probes
Optical Gas Sensor Modules (OEM)0 modelsndir · nduv · doas
Instruments buyers specify most often
Each of these has a photograph, a published specification table and a full standards list. Follow any model for the full configuration options and the method it satisfies.
3012H-D16 typesand Low-Flow Rate Fixed Source Emission Integrated Tester
Sampling flow: up to 100 L/min; Pump: >=60 L/min at 20 kPa
3012HVerified specStack Dust Sampler / Flue Gas Analyzer
Pitot tube isokinetic sampling, filtering and gravimetric determination; Isokinetic tracking with short response time
2086FTIRPortable Fourier Transform Infrared Gas Analyzer
Gases: H2O, CO, CO2, SO2, NO, NO2, N2O, NOx, NH3, HCl, CH4, C2H6 (expandable); Sample cell (1000~4500) cm3
302322 generationsUV Dual Flue Gas Comprehensive Analyzer
SO2 (0~4250) mg/m3; NO (0~4230) mg/m3
3030B21 typesExhaust Gas Dioxin, Heavy Metal, / Organic Compound Integrated Tester
Sampling flow (0~120) L/min, >=60 L/min at 20 kPa; Solution absorption method
1089KBeta rayBeta-Ray Stack Dust Sampling Probe
Concentration (0~50) mg/m3; Probe heated 130C (100~160 optional)
3033FID + PIDPortable Volatile Organic Gas Detector
FID (1.9~50,000) ppm methane; PID (1~20000) ppm butene
30353 variantsPortable Total Hydrocarbon and Methane / Non-Methane Hydrocarbons Monitoring
Type A: catalytic oxidation + FID; Type B: GC separation + FID
3233Ex ia IIC T4 GaGas Leak Detect Infrared Thermal Imager
Field of view 24×20 deg; Min imaging distance 0.5 m
2025BVerified specPortable PM2.5/PM10 Online Monitoring Instrument
PM2.5 (0~1000) ug/m3; PM10 (0~1000) ug/m3
2092Single/dual/fullAmbient Air Quality Monitoring Instrument
Beta-ray: (0~100000) ug/m3; error +/-10%
2031Reference gravimetricLarge Flow Environment Air Particulate Sampler
Flow 0.8~1.2 m3/min, working point 1.05 m3/min; Filter 230×188 mm
2193IEC 61672Environment Noise Automatic Monitoring Instrument
(20~130) dB(A); 10 Hz~20 kHz
503440 positionsFully Automatic CODcr Analyzer
40 sample positions; Range (16~100) mg/L at 10 mL
503254 positionsFully Automatic Permanganate Index Analyzer
54 sample positions, 9-position digestion; Precision RSD <=3.0% at 3.0 mg/L (n=3)
5040Unmanned boatAutonomous Sampling and Monitoring Vessel
2 km dual-link comms (2.4G/5GHz); Endurance 1029 min at 5 m/s
8032100,000-fold dilutionMalodor Olfactometer
MFC flow (0~10) mL/min / (0~500) mL/min / (0~10) L/min / (0~100) L/min; Dilution 10 to 100,000-fold
804023 versionsHigh-Intelligence Comprehensive Calibrator
Micro (10~200) mL/min; Small (200~2000) mL/min
Built for the industry you work in
Select your sector for the recommended instrument set, the applicable methods and the engineering constraints that decide the specification.
Cement, Lime & Steel
Chemicals & Petrochemical
Waste Incineration
Municipal Environment
Laboratories
Method compliance, stated point by point
Isokinetic stack testing follows US EPA Method 1–5, EN 13264-1 or GB/T 16157-1996. Stack gas analysis follows EPA Methods 3A, 6, 7, 10 and 14 or EN 15259-3. Dioxin sampling follows EPA Method 23 or EN 1948-2. The full equivalence table covers 23 parameters across four jurisdictions, states what each method actually determines, and links to the instruments that execute them.
The table is also available as a spreadsheet for tender documents and client submissions.
Manufacturing, calibration and service under one roof
Production
Sampling heads, gas paths and electronic cores are assembled and functionally tested in-house. High-load low-noise sampling pumps and industrial embedded control platforms are selected for field durability rather than for bench performance in a laboratory.
Calibration
Every instrument is calibrated against traceable reference standards before dispatch. The calibration record travels with the unit, listing the measured values, the reference standard used and the acceptance tolerance.
Service and spares
Spare part lists, consumable part numbers and typical service life are published per product family. Long-life wearing parts are stocked, and calibration and repair service is available even for instruments bought through a distributor.
OEM and ODM
Kesen manufactures for other brands. We build under customer names, model numbers, documentation and packaging — from a logo and nameplate change through to a fully re-engineered platform, including optical measurement cores supplied to instrument builders with firmware, protocol and calibration tooling.
Stated before you commit: MOQ by model · non-recurring engineering cost and what it covers · lead time to first article · channel protection, so your private-label models are not sold to your competitors. OEM & ODM programme →
Some of our instruments carry CE and GB 3836 (IECEx-aligned) conformity. Those are not the same as a certificate issued by a European notified body, and we describe them accurately rather than implying a certification we do not hold. The same applies to suitability declarations: Kesen supplies the instrument configuration and verification records, and the compliance report is prepared by your own accredited test body.
Send us your method, your gas and your range
Tell us the application, the measurement range, the gas or parameter, the output protocol you need and your target delivery date. An engineer will reply with a configuration recommendation and a quotation — normally within one working day.