4.2 Temperature only probe option (HMP371 and
HMP373)
HMP371 and HMP373 probes can be ordered as temperature only probes. In the T-only probe
version, humidity measurements cannot be configured into use. The factory default output
configuration for the T-only versions of HMP371 and HMP373 is:
1. Channel 1: Temperature output
2. Channel 2: Output disabled
If you need to verify whether the probe in your transmitter is a T-only version, check the
configuration code on the product label.
II 1 G Ex ia IIC T4 Ga
II 1 D Ex ia IIIC T
200
85 °C Da
-40 °C ≤ T
amb
≤ +60 °C
EESF 20 ATEX 085X
IECEx EESF 20.0044X
Made in Finland 2022
Vaisala Oyj,Vanha Nurmijärventie 21
FI-01670 Vantaa, Finland
HMT370EX TRANSMITTER
HMT370EX 1 1 4 1 N B 1 A C 1 N N
Serial No. P12345678
Input 12 – 28 V d, 4 – 20 mA
Ui=28 VDC, Ii=100 mA,
Pi=700 mW, Ci=12.1 nF, Li=16 µH
0537
1
Figure 21 Location of configuration code on product label
1 Configuration code location on product label
If the 3rd digit of the configuration code is 4, 5, 6, or 7, the probe is a T-only version.
Example: HMT370EX 1 1 4 1 N B 1 A C 1 N N
4.3
HMP371 fixed probe
Dimensions
The HMP371 fixed probe option has a probe head that attaches directly on the probe body,
making it suitable for wall mounting applications.
[1.61]
ø12 [0.47]
86 (3.39)
59 [2.3]
56.8 [2.23]
127 [5]
41
Figure 22 Dimensions in mm (inches)
Chapter 4 – Probe options
63
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