FHA-Series Humidity Sensors

Clark Solutions
FHA-Series Humidity Sensors
Capacitance-type, ALMEMO^® Ready

DESCRIPTION
The FHA-Series humidity sensors work with ALMEMO^® series indicators and data loggers to provide accurate measurement of relative humidity, temperature, dew point, mixture ratio, enthalpy, and partial vapor pressure. The capacitance sensor used in the FHA-series contains a glass substrate with a humidity-sensitive polymer layer between two metal electrodes. The absorption of water in the thin film changes with relative humidity, and therefore changes the capacitance between the two electrodes. The measuring signal is directly proportional to the relative humidity and is independent of changes in atmospheric pressure. Standard sensor cable length is 5 feet. An ALMEMO^® connector is supplied with each sensor.

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FHA646-E1 Plastic Handle for measurements to 60°C

FHA646-E1C Stainless Handle for measurements to 80°C

SPECIFICATIONS
FHA646-E1, FHA646-E1C, AND FHA646-R
Operative range:
      FHA646-E1: –20 to +60°C/ 5...95% rH.
      FHA646-E1C: –20 to +80°C/ 5...95% r.H.
      FHA646-R: –30 to +100°C / 5...98% r.H.
Humidity sensor: capacitive
Humidity accuracy: ±2% r.H. at nominal temperature
Humidity repeatability: < 1% r.H. at nominal
      temperature
Nominal temperature: 25°C ±3°C
Response time T90: approx. 10s at 1m/s
Temperature sensor: NTC type N
Temperature accuracy:
      –20 … 0°C: ±0.4°C
      0 … 70°C: ±0.1°C
      70 … 100°C: ±0.6°C
Temperature repeatability: 0.1°C
Sensor tube :
      FHA646-E1 : plastic,12 mm dia.,155 mm long
      FHA646-E1C : stainless steel,12 mm dia.,
            160 mm long
      FHA646-R: nickel plated, 5mm dia., 50 mm long
Protective cap: FHA646-1 & FHA646-1C,SK7, metal-mesh
      filter; FHA646-R none
Cable: 1.5m long(FHA646-R, 2m), with ALMEMO^®      connector
FHA636-HR(1,2)
Operating range :
      Sensor tip : –50 to +150°C (200°C)
      Sensor handle : -20 to +60°C
Humidity measuring range: 0 to 98% r.H.
Humidity sensor: capacitive
Accuracy:
      ±1.5% r.H. at nomin. temperature
      ±2.5% r.H.< 10% and > 90%
Repeatability: 0.5% r.H.
Nominal temperature: 23°C ±2°C
Response time T63: 15s without filter at 1m/s air speed
Temperature sensor: Pt100, 1/3 Class B
Accuracy: ±0.3°C at nominal temperature
Repeatability: 0.1°C
Sensor handle: heat resistant plastic , 15mm dia.,
      180 mm long
Protective cap: wire screen
Cable: 2m long, ALMEMO® connector

FHA646-R Compact sensor for tight access to 100°C

FHA636HR(1,2) Suitable for measurements to 100 (1) or 200 (2)°C

ORDERING INFORMATION

FOR YOUR CONVENIENCE, THESE ITEMS ARE AVAILABLE ONLINE OR PLEASE CALL 1-800-253-2497 TO ORDER
Model	Description
FHA646-E1	Humidity sensor with plastic handle, -20 to +60 °C
FHA646-E1C	Humidity sensor with stainless steel handle,active temperature compensation, -20 to +80°C
FHA646-R	Humidity sensor, -30 to +100°C
FHA636-HR1	Humidity Sensor, L = 250mm, Operating range –50 … 150°C
FHA636-HR2	Humidity Sensor, L = 400mmOperating range –50 … 200°C
ZA9060-VK2	Extension cable, 2m long
ZA9060-VK4	Extension cable, 4m long

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These products are for use with our portable, bench-top and rack mount meters and data loggers. Refer to our data logger data sheets for further application information or give us a call.

For assistance call 978-568-3400