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Cost Effective Humidity Validator - Michell S904

Updated:2025-03-13

Brand: PST/Michell
Model: S904
Description: The S904 is a stand-alone and transportable humidity calibrator which is easy to use and maintain. The calibration chamber features 5 interchangeable ports to accommodate virtually any brand, type or
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Product Details

Cost Effective Humidity Validator - Michell S904 Description：

Product Manual Datasheet

Stand-Alone Instrument for On-Site Humidity Validation

Features

Simple operation and maintenance

Easy calibration of relative humidity sensors

Excellent chamber stability and uniformity

Manual control or optional straightforward automated set point programming

Optional in-built data-logging for reference probe and probes under calibration

Humidity and temperature-controlled chamber

Generate 10 to 90% RH over +10 to +50°C temperature

Transportable to allow on-site calibrations

The S904 is a stand-alone and transportable humidity calibrator which is easy to use and maintain. The calibration chamber features 5 interchangeable ports to accommodate virtually any brand, type or model of humidity sensor. This calibrator is ideal for companies or organizations looking to calibrate large numbers of probes in a laboratory or field setting.

Specifications

Humidity
Generation Range	10-90% RH
Accuracy Control Element	≤±1% RH (10–70% RH) ≤±1.5% RH (70–90% RH)
Stability	±0.2% RH (20–80% RH)
Temperature
Generation Range	+10 to +50°C (Lowest T set point = 10°C below ambient)
Accuracy	±0.1°C
Stability	±0.1°C
Chamber
Ramp Rate from +20 to +40°C +40 to +20°C	1.5°C/minute 0.7°C minute
Control Element	Removable relative humidity sensor
General
Probe Ports	up to 5 – sensor body diameters 5 to 25mm accommodated by port adapters
Chamber Volume	2000cm3
Chamber Dimensions	105 x 105 x 160mm (h x w x d)
Instrument Dimensions	290 x 520 x 420mm (h x w x d)
Set Point Resolution	0.1 for humidity and temperature
Displays	3 digit LED, 10mm characters
Supply	85 to 264 V AC, 47/63 Hz, 150 VA
Weight	20kg