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-rw-r--r--CHANGES2
-rw-r--r--pint/default_en.txt4
2 files changed, 6 insertions, 0 deletions
diff --git a/CHANGES b/CHANGES
index 16c25e7..438a664 100644
--- a/CHANGES
+++ b/CHANGES
@@ -16,6 +16,8 @@ Pint Changelog
(PR #1669)
- Fixed Quantity type returned from `__dask_postcompute__`.
(PR #1722)
+- Added Townsend unit
+ (PR #1738)
### Breaking Changes
diff --git a/pint/default_en.txt b/pint/default_en.txt
index ed4f3d8..f0ccd8e 100644
--- a/pint/default_en.txt
+++ b/pint/default_en.txt
@@ -430,6 +430,10 @@ atomic_unit_of_electric_field = e * k_C / a_0 ** 2 = a_u_electric_field
# Electric displacement field
[electric_displacement_field] = [charge] / [area]
+# Reduced electric field
+[reduced_electric_field] = [electric_field] * [area]
+townsend = 1e-21 * V * m^2 = Td
+
# Resistance
[resistance] = [electric_potential] / [current]
ohm = volt / ampere = Ω