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Michell Instruments
Michell Instruments Opti-Cal RH & Temperature Calibrator
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Michell Opti-Cal: 10–90% RH; ≤±1% RH (10–70%); +10…+50 °C; ±0.1 °C. RFQ.
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Key parameters
Humidity Generated Range
10–90% RH
Humidity Control Accuracy
≤±1% RH (10–70% RH); ≤±1.5% RH (70–90% RH)
Humidity Stability
±0.2% RH (20–80% RH)
Temperature Generated Range
+10 to +50°C (+50 to +122°F); lowest set-point 10°C below ambient
Temperature Accuracy Stability
±0.1°C accuracy; ±0.1°C stability
Chamber Ramp Rate
+20→+40°C: 1.5°C/min; +40→+20°C: 0.7°C/min
Fits RH probe calibration where you need a Michell Instruments Opti-Cal. Portable humidity and temperature calibrator generating 10–90% RH with control ≤±1% RH (10–70% RH) / ≤±1.5% RH (70–90% RH), ±0.2% RH stability (20–80%), and chamber temperature +10 to +50 °C at ±0.1 °C accuracy/stability.
Key advantages
- RH generated — 10–90% RH
- RH control — ≤±1% (10–70%); ≤±1.5% (70–90%)
- RH stability — ±0.2% RH (20–80%)
- Temperature — +10 to +50 °C; ±0.1 °C
- Portable — Chamber calibrator form
Typical applications
- RH probe calibration.
- Transmitter checks.
- Lab / field humidity cal.
Selection guide
- Probe adapters
- Setpoint vs ambient
- Reference probe
Common mistakes
- Lowest T below ambient−10 °C.
- Overloaded chamber.
- Ignoring RH stability band.
When to RFQ / what to tell us
- Adapters/options.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 46125 |
| Brand | Michell Instruments |
| Model | Opti-Cal RH & Temperature Calibrator |
| Product type | Humidity Calibrator |
| Humidity generated range | 10–90% RH |
| Humidity control accuracy | ≤±1% RH (10–70% RH); ≤±1.5% RH (70–90% RH) |
| Humidity stability | ±0.2% RH (20–80% RH) |
| Temperature generated range | +10 to +50°C (+50 to +122°F); lowest set-point 10°C below ambient |
| Temperature accuracy/stability | ±0.1°C accuracy; ±0.1°C stability |
| Chamber ramp rate | +20→+40°C: 1.5°C/min; +40→+20°C: 0.7°C/min |
Documents
FAQ
Q: RH range? A: 10–90% RH.
Q: T accuracy? A: ±0.1 °C.
Q: What should I send for a quote? A: Adapters/options, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Humidity Generated Range | 10–90% RH |
| Humidity Control Accuracy | ≤±1% RH (10–70% RH); ≤±1.5% RH (70–90% RH) |
| Humidity Stability | ±0.2% RH (20–80% RH) |
| Temperature Generated Range | +10 to +50°C (+50 to +122°F); lowest set-point 10°C below ambient |
| Temperature Accuracy Stability | ±0.1°C accuracy; ±0.1°C stability |
| Chamber Ramp Rate | +20→+40°C: 1.5°C/min; +40→+20°C: 0.7°C/min |
| Reference Accuracy | Dew point ±0.2°C; temperature ±0.1°C (integrated Optidew) |
| Probe Ports | Up to 5 ports; sensor body diameters 5–25 mm via adapters |
| Chamber Volume Dimensions | 2000 cm³; chamber 105×105×160 mm (W×H×D) |
| Instrument Dimensions | 520×290×420 mm (W×H×D) |
| Outputs | Analog 4–20 mA or 0–20 mA; RS232 @ 9600 baud; volt-free alarm 30 V / 100 mA |
| Power Weight | 85–264 V AC, 47/63 Hz, 150 VA; weight 20 kg (44 lb) |
| Control | Manual front-panel or automated time-based set-point programs via PC software |
| Set Point Resolution | 0.1 for humidity and temperature |