Deltatox I & II repair, service & calibration.
Rematek keeps your portable Deltatox field toxicity analyzers accurate and deployment-ready — diagnostics, repair, calibration, and parts from an authorized Modern Water service representative with 30+ years on these instruments.
Authorized Modern Water service representative for 30+ years — Fallbrook, CA

What Rematek services on the Deltatox I & II
Every Deltatox analyzer is diagnosed, repaired, and calibrated by an authorized Modern Water service representative with three decades of hands-on experience.
Diagnostics & repair
Full fault diagnosis and component-level repair of Deltatox I & II portable analyzers, restoring dependable field operation.
Precision calibration
Calibration and performance verification so your Deltatox toxicity readings stay accurate from one deployment to the next.
Parts & ongoing support
Replacement parts and direct support to keep your Deltatox analyzers in the field and out of the repair queue.
Transparent Deltatox service pricing
Straightforward rates from an authorized service representative — quoted before any work begins.
Component-level diagnosis and repair of Deltatox I & II portable analyzers, restoring dependable field operation.
First hour covers handling and troubleshooting and is non-refundable — but it rolls into the repair if you proceed. Any parts required are additional.
Fully certified cleaning, calibration, and performance verification with certification documentation.
Includes certification documentation and most required repairs. Any parts required are additional.
- Turnaround
- 72 hours — fast turnaround is a priority, barring unforeseen issues, which are rare.
- Return shipping
- Your instrument is returned on Rematek's FedEx account, with the shipping cost added to your invoice — unless you'd prefer it returned via your own FedEx account or shipping method.
Cleaning & calibration ships with a Certification of Quality.
A certified cleaning and calibration comes back with a signed Certification of Quality — your formal report and proof of service. It declares the unit meets or exceeds its original design and test parameters, and documents the standards and functional checks behind that result. A repair-only job is different: if you simply need the instrument diagnosed and running again, that's exactly what we do — no calibration certificate is issued.
- Calibration traceability
- NIST-traceable standards
- Electromagnetic compatibility
- EMC Directive 89/336/EEC
- Electrical safety
- Low Voltage Directive 73/23/EEC
All measuring instruments are calibrated by industrially accepted methods with accuracies traceable to NIST. Hard copies of calibration and test records are kept perpetually and are available on request.
What's tested and documented
- Cool block temperature
- Reagent block temperature
- Computer communication
- Mode differentiation
- Photomultiplier light response
- Read and set functions
- Full functionality
All Microtox, Deltatox & RPA service in one place
See the full range of servicing and repair Rematek provides across every Microtox, Deltatox, and RPA instrument — repair, cleaning & calibration, pricing, and turnaround.
Need cleaning & calibration only?
The factory-channel cleaning and calibration service for the Microtox M500 and Deltatox was discontinued. Rematek offers it directly — see what's included and how it keeps your results compliant.
Weighing a refurbisher or third-party repair?
See how a factory-authorized Modern Water representative differs from general equipment brokers like York Scientific — and where each option fits.
Deltatox service questions
- Who services the Deltatox analyzer?
- Rematek, LLC services and repairs the portable Deltatox I and Deltatox II field toxicity analyzers. Owner Mark Woodward is an authorized Modern Water service representative with over 30 years of experience, based in Fallbrook, California.
- Can you calibrate a Deltatox field analyzer?
- Yes. Rematek calibrates and performance-verifies Deltatox I & II analyzers so your field toxicity readings stay accurate and ready for deployment.
- Do you repair both Deltatox I and Deltatox II?
- Yes. Rematek services both the Deltatox I and Deltatox II portable analyzers, including in- and out-of-warranty units.
- How do I get my Deltatox serviced?
- Reach out to Rematek with your instrument and the issue you're seeing. Rematek reviews the fault and the work required before any service begins.

“Modern Water is pleased to announce it has appointed Rematek, LLC as an authorized service representative for its Microtox M500 and Deltatox acute toxicity analyzers.”
Rematek is a contract manufacturing specialist for environmental science technologies in Fallbrook, CA. Mark Woodward, the owner and operator of Rematek, has been an authorized service representative for over 30 years.
Ready to get your analyzer serviced?
Tell us what you're running and what it needs. Rematek will get it back to peak precision.
Request Service