EMD-4000B Datasheet, PDF (3/4 Pages) Amphenol Corporation – Excellent interchangeability

EMD-4000B Specifications
%RH Range at 77°F (25°C)
20% to 95%
Operating Temperature
41°F to 140°F (5°C to 60°C)
Storage
0% to 95% RH, -40°F to 185°F (-40°C to 85°C)
Accuracy
• ±5% RH standard
• ±3% RH available on request
Repeatability
±0.5% RH
Impedance
72K W at 77°F (25°C), 50% RH with 1 VAC at 1 KHz
excitation
Response Time
<1 minute for 63% step change in non moving air
Hysteresis
<1% RH at 77°F (25°C) for step change from 30% to
98% RH then back to 30% RH
Temperature Dependence
0.5% RH/°F (°C, average)
Ordering Information
Part Number - EMD4000B
Bulk resistance-type humidity sensor 5%
Long Term Drift
0.1% RH/year typical in clean, chemical free air
Dimensions
0.2 in (5.1 mm) wide x 0.4 in (10.2 mm) high x 0.02 in
(0.51 mm) thick
Leads: 0.4 in (10.2 mm) long x 0.15 in (3.81 mm) wide x
0.01 in (0.25 mm) thick on 0.1 in (2.54 mm) centers
Exposure to Saturated Chemical Vapors
• Toluene, 25,200 ppm/3 days: <2% RH drift
• Hexane, 152,000 ppm/3 days: <2% RH drift
• Methanol, 127,000 ppm/3 days: <5% RH drift
Transformer Oil; 60K W at 30 ppm at 77°F (25°C)
• 3 months at 77°F (25°C): <5% drift, 2% RH typical
• 1 month at 185°F (85°C): <5% drift, 2% RH typical
Water Vapor Saturation
100% RH/77°F (25°C)/1000 hours storage; <3% RH drift
typical; 1/16 in (1.59 mm) water droplet covering entire
sensor surface for 10 minutes followed by drying via air
ventilation; <5% drift
Caution
DC current should never be applied to the EMD-4000B
humidity sensor. Application of direct current will
polarize the sensor and cause an irreversible shift. Only
a symmetrical AC excitation current should be applied.
Telaire recommends that application of a low level
AC excitation (1 VAC, 1 KHz typical) to minimize self-
heating effects.
.200 in
(5.08 mm)
.400 in
(10.2 mm)
.80 in
(20.3 mm)
.100 in
(2.54 mm)
.060 in
(1.52 mm)
typical
.025 in
(.635 mm)