factory price high resistance meter dynamic contact measurement supplier - Bulk Supply and Specification Guide
Unit price and service life diverge sharply once you move past the headline specification sheet. A meter that reads 1015 Ω on the bench can drift 5% after six months of daily contact cycling if the input protection network uses undersized TVS diodes.
Before comparing quotations, ask for the actual component derating report and the contact probe wear curve. Those two documents reveal whether the factory has engineered for the 10 000‑cycle minimum that most private‑label buyers require, or simply assembled a reference design and hoped for the best.
Scope of Supply and Physical Form
The standard delivery includes the meter chassis, a calibrated Kelvin probe set, USB‑C and LAN interfaces, and a 100‑240 VAC switch‑mode power supply. Optional rack‑mount ears add 1 U of height and are fitted at the factory without re‑calibration. The enclosure is die‑cast aluminum with a conductive chromate finish, rated IP40 front and IP20 rear.
Probe cables are 1.5 m silicone‑insulated, terminated in gold‑plated banana plugs. Each unit ships with a traceable calibration certificate referencing the factory’s primary standard (traceable to NIM). No software licence fees apply; the firmware is field‑upgradable via the front USB port.
Size, Weight and Specification Range
| Parameter | Range / Value | Notes |
|---|---|---|
| Resistance measurement range | 103 – 1015 Ω | Auto‑ranging, 5‑digit resolution |
| Test voltage | 10 V – 1000 V DC, programmable | Accuracy ±1% ±2 V |
| Dynamic contact measurement | 0.1 mΩ – 10 Ω, 1 kHz AC | 4‑wire Kelvin, 100 µA test current |
| Dimensions (W×H×D) | 215 mm × 88 mm × 310 mm | Excluding probe cables |
| Weight | 2.8 kg | With probes and power supply |
| Operating temperature | 0 °C – 40 °C | Non‑condensing |
How to Choose Before Requesting a Quote
Critical specification rule
If your private‑label spec calls for <0.5% drift after 10 000 contact cycles, the meter must use a guarded input amplifier with a dedicated bootstrap supply. Standard reference designs omit this to save BOM cost; the result is a 1–2% drift that shows up only after months in the field.
Compare the two common probe‑interface architectures side by side:
Guarded bootstrap input
- Leakage current <10 fA at 1000 V
- Drift <0.3% / 10 k cycles
- Adds ~$12 BOM per unit
Standard reference input
- Leakage current ~50 fA at 1000 V
- Drift 1–2% / 10 k cycles
- Baseline BOM cost
The guarded version pays for itself when the end‑customer’s warranty claim rate drops below 0.5%. For distributors targeting price‑sensitive educational labs, the reference input may be acceptable if the spec sheet only cites initial accuracy.
Usage Scenarios and Buyer Segments
Primary users are incoming‑quality teams at connector manufacturers who need to verify contact resistance on every reel. They run the meter in continuous dynamic mode, logging 200 readings per minute. A secondary segment is calibration labs that offer accredited high‑resistance calibration services; they value the programmable test voltage and LAN interface for automated test sequences.
Distributors serving university physics departments often order the base model with the standard reference input, then upsell the guarded upgrade as a calibration‑service package. Private‑label brands typically specify the guarded architecture, custom front‑panel branding, and a 3‑year warranty to differentiate from catalog competitors.
Segment-Specific Requirements
- Connector QA lines: require 10 k cycle probe life, 0.1 mΩ resolution, and a foot‑switch trigger for hands‑free operation.
- Calibration labs: demand ISO 17025‑compatible uncertainty budgets, rear‑panel BNC for external guard, and SCPI command set over LAN.
- Private‑label brands: need custom overlay artwork (minimum 300 dpi vector), serialized firmware build, and a dedicated spares stock agreement.
Quality Control and Batch Consistency
Every production batch undergoes a 48‑hour burn‑in at 40 °C with continuous resistance cycling across the full range. The factory records the first‑derivative of drift for each channel; any unit exceeding 0.05%/hour is pulled for root‑cause analysis.
Probe sets are tested for contact force repeatability using a calibrated spring gauge. The target is 0.5 N ±0.05 N across 10 000 actuations. Springs that deviate are replaced before the probe leaves the assembly cell.
What Gets Checked Before Shipment
Final inspection covers:
- Verification of resistance accuracy at 103, 106, 109, 1012, 1015 Ω against the primary standard.
- Dynamic contact resistance sweep from 0.1 mΩ to 10 Ω at 1 kHz, confirming linearity within ±0.2%.
- Interface communication test: USB‑C enumeration, LAN ping, SCPI command response.
- Mechanical check: probe cable strain relief, connector retention, front‑panel button tactile force.
- Packaging integrity: anti‑static bag, foam inserts, outer carton drop‑tested per ISTA 1A.
A shipment release report is emailed to the buyer with serial numbers, calibration dates, and a pass/fail summary for each test.
Ordering, Tooling and Lead-Time Questions
Frequently asked questions
- What is the MOQ for a private‑label run? 50 units. Below that, the custom overlay and firmware serialization setup cost is not amortised.
- How long does tooling for a custom front panel take? Four weeks from approved artwork to first article. The artwork must be supplied as a layered PDF with Pantone spot colours.
- Can we order a mixed batch of guarded and reference inputs? Yes, but each variant requires a separate calibration fixture setup. Minimum 20 units per variant to avoid a changeover surcharge.
- What is the standard lead time for a repeat order? Six weeks ex‑works. Expedited three‑week slot is available for a 15% surcharge if the production line has capacity.
- Are spare probe sets stocked? Standard probe sets are kept in stock for 30‑day shipment. Custom probe tip geometries require a 100‑unit blanket order.
Ready to discuss your project?
Send us your target specification, annual volume forecast, and branding requirements. We will return a detailed quotation with lead‑time options and a sample approval schedule within two business days.
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