diff --git a/src/instruments/srs/srsctc100.py b/src/instruments/srs/srsctc100.py
index 8b0e8057..3bc9ee97 100644
--- a/src/instruments/srs/srsctc100.py
+++ b/src/instruments/srs/srsctc100.py
@@ -36,6 +36,7 @@ def __init__(self, filelike):
         "\xb0C": u.celsius,
         "W": u.watt,
         "V": u.volt,
+        "K": u.kelvin,
         "\xea": u.ohm,
         "": u.dimensionless,
     }