pH & Alkalinity (TBN)
- Target pH range: 8.5 - 9.5 for most metalworking fluids
- TBN trending — flags reserve alkalinity loss
- Predicts when biocide or buffer additive is needed
- Catches premature emulsion split early
Coolant testing & sample analysis is the laboratory and on-site evaluation of metalworking fluids in active CNC and manufacturing systems — measuring pH, TBN, refractometer concentration, bacteria and fungi count, tramp oil contamination, and particle counts. Vasundhara Performance Solutions provides coolant sample testing across Hyderabad, Secunderabad, and Telangana with sample pickup, lab analysis, and report turnaround in 3-5 working days. Our reports include corrective recommendations — additive top-up, biocide dosing, tramp-oil separation, full system flush — so test results translate into immediate maintenance actions. Pan-India sample submission is also supported via our pre-labelled sample kits.
Sample Analysis That Drives Maintenance Decisions
A coolant test report is only useful if it tells you what to do next. Our reports include a clear corrective-action column — "biocide top-up at 200 ppm", "full system flush within 2 weeks", "tramp oil skimmer required" — alongside the raw lab numbers. CNC shops, machine builders, automotive tier-1 suppliers, and aerospace machining centres across Telangana and Andhra Pradesh use our testing as the trigger point for both routine maintenance and pre-failure intervention.
What's in the Test Panel
Refractometer Concentration
- Hand-held refractometer reading (Brix)
- Cross-checked against OEM target dilution
- Flags over-dilution (rust, microbial growth) or over-concentration (skin issues, wastage)
- Operator training included if needed
Bacteria & Fungi Count
- 48-72 hour culture for aerobic/anaerobic counts
- Detects bio-fouling before odour or skin reactions appear
- Biocide-type recommendations matched to species
- Critical for shops with operator-skin complaints
Tramp Oil Contamination
- Quantifies hydraulic oil, way oil, lube oil ingress
- Recommends skimmer, centrifuge, or belt separator
- Prevents emulsion split and bacterial growth
- Reduces tool wear and surface-finish issues
Particle Count & Wear Metals
- ISO 4406 cleanliness code (4-, 6-, 14-micron)
- Iron and aluminium wear-particle quantification
- Indicates filter performance and tool wear
- Useful pre-flush vs. post-flush comparison
Visual Inspection & Trend Reports
- Colour, odour, foam, separation flags
- Photo documentation of sample appearance
- Quarterly trend report for repeat samples
- Maintenance-decision summary (1 page) per sample
Why Routine Coolant Testing Pays Off
Extend Coolant Service Life
Catching contamination, microbial growth, or emulsion drift early extends the usable life of each coolant charge by 30-50% on average — directly reducing fluid spend and disposal costs.
Reduce Operator Skin & Health Complaints
Bacterial growth and pH excursions are the leading cause of dermatitis complaints in machine shops. Routine testing identifies the issue before it becomes a workplace complaint or HR escalation.
Cut Tool Wear & Surface-Finish Defects
Off-spec coolant accelerates tool wear and produces inconsistent surface finish. Test-driven adjustments restore both — often paying for the testing programme in the first month of intervention.
Audit-Ready Documentation
Test reports formatted for ISO 9001, IATF 16949 (automotive), and tier-1 OEM customer audits. Archived 3 years for retrospective audit support — required for many automotive supplier qualifications.
Industries We Test For
CNC Machine Shops
Automotive Tier-1 / Tier-2
Aerospace Machining
Defence Workshops
Heavy Engineering
Tool-Room & Die Shops
Two Ways to Submit a Sample
On-Site Pickup (Hyderabad & Secunderabad)
Our technician visits your shop floor, draws the sample under controlled conditions, and (for first-time clients) does a no-cost visual coolant-system audit during the visit. Best for companies starting a routine testing programme.
Sample-Kit Submission (Pan-India)
We courier you a pre-labelled sample kit with bottles, instructions, and a submission form. Your team draws the sample, completes the form, and ships it back via courier. Reports issue 3-5 working days from sample receipt.
Frequently Asked Questions
What does a coolant testing service measure?
A complete coolant test panel measures pH (alkalinity), TBN (total base number), refractometer concentration (% emulsion strength), bacteria and fungi count, tramp oil contamination, particle count, and chloride/iron content where applicable. We also flag visual signs — colour change, odour, foaming, splitting — that indicate failing coolant before lab data confirms it.
How often should coolant be tested in a CNC shop?
Standard practice is monthly testing for active CNC machines, with weekly visual checks (colour, odour, refractometer reading by the operator). High-throughput machine shops with 3-shift operation benefit from bi-weekly lab testing. Vasundhara provides scheduled sampling routes across Hyderabad and Telangana, with sample pickup integrated into your existing maintenance calendar.
How long do coolant test results take?
Standard turnaround is 3-5 working days from sample collection to digital report. Bacteria and fungi cultures take 48-72 hours of incubation, which typically drives the timeline. Critical or emergency samples can be expedited to 24-48 hours where the issue affects production. All reports include clear corrective recommendations — additive top-up, biocide dose, full system flush — not just numbers.
Do you collect coolant samples on-site or do we send them in?
Both options are supported. For Hyderabad and Secunderabad, our technicians can visit your shop floor for sample collection — particularly useful for first-time engagements where we also do a visual coolant-system audit at no extra cost. For other locations across Telangana, Andhra Pradesh and pan-India, we provide pre-labelled sample bottles, return-courier instructions, and a sample submission form.
Can coolant testing identify tramp oil contamination?
Yes — and tramp oil is one of the most common reasons CNC shops contact us. Hydraulic oil leaks, way oil, and lube oil contaminating the coolant cause emulsion splitting, bacterial growth, dermatitis complaints from operators, and tool-life reduction. Our test panel identifies tramp oil concentration; our recommendations include separation method (skimmer, centrifuge, belt) and frequency. We also supply the separation equipment and follow-up coolant management as a complementary service.
Is coolant testing useful before a full system flush?
Pre-flush testing is strongly recommended. Test results determine whether a full flush is actually required (sometimes a top-up and biocide treatment is enough), what cleaner concentration to use, and how to dispose of the spent coolant safely. Post-flush testing — done 1-2 weeks after recharge — confirms the new coolant is stable and within target ranges. Vasundhara coordinates the pre-flush test, the flush itself (via our coolant management service), and the post-flush verification as a single engagement.
Do you provide compliance documentation for ISO and customer audits?
Yes. Test reports are formatted to meet ISO 9001 quality-system audit requirements and customer audit trails for tier-1 OEM suppliers. Each report carries the sample reference, collection date and time, technician name, lab test method (ASTM where applicable), result, target range, and corrective action taken. Reports are archived for 3 years and re-issuable for retrospective audit support — required for many automotive tier-1 supplier qualification programs.
Last updated: May 2026
Start a Coolant Testing Programme
Tell us how many machines, what coolant brand, and your test cadence preference. We'll build a sampling and reporting plan that fits your maintenance calendar — pickup or pan-India sample-kit, your call.
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