Perhaps most well-known is our Magnehelic gage, which has been an industry standard since its introduction in 1953.
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DWYER:1900-1MR
SKU: DWYER:1900-1MR
DWYER:1950G-0-B-120-NA
SKU: DWYER:1950G-0-B-120-NA
DWYER:1950G-1-B-120-NA
SKU: DWYER:1950G-1-B-120-NA
DWYER:1950P-25-2F
SKU: DWYER:1950P-25-2F
DWYER:641RM-12
SKU: DWYER:641RM-12
DWYER:645-1
SKU: DWYER:645-1