1. Humidity Sensors Tests for F-Pixel
L. Cremaldi
HMX- 2000
Silicon micromachined piezoresistive humidity sensing chip based on shear stress hygrometry for direct measurement of relative vapor pressure.
A dab of polymer flexes a modified strain gauge in reponse to humidity changes.
HMX2000 die begins at $15.00 each for quantities up to 1,000 units.
Reported to be radiation hard.
Testing Warm/Cold response near RH~0 against a
Honeywell HIH-3610 humidity sensor before and
after radiation.
Detection of FC72 Leak ?? N2 in
out
HMX T HIH
GAS BOX
HMX2000 DIE

2. COOL
DOWN
FC72
LEAK
H2O
LEAK

3. HMX Sensor responding as advertised.
POSSIBLE FC72 RESPONSE?
SUMMARY
HMX Sensor responding as advertised.
Tracking well with HIH sensor T>oC.
Possible sensitivity to FC72.
Test board and Radiation Tests Envisioned.
DCU Readout or Direct??