diff --git a/ohmpi/hardware_components/mb_2023_0_X.py b/ohmpi/hardware_components/mb_2023_0_X.py
index 2f68994f030158f10166afbb0710efa102db4a48..43446c31f523de171b5adeaa9837a4c6da88e42d 100644
--- a/ohmpi/hardware_components/mb_2023_0_X.py
+++ b/ohmpi/hardware_components/mb_2023_0_X.py
@@ -149,9 +149,9 @@ class Tx(TxAbstract):
     def gain_auto(self):
         self._adc_gain_auto()
 
-    def inject(self, polarity=1, injection_duration=None):
+    def inject(self, polarity=1, injection_duration=None, switch_pwr=False):
         self.polarity = polarity
-        TxAbstract.inject(self, polarity=polarity, injection_duration=injection_duration)
+        TxAbstract.inject(self, polarity=polarity, injection_duration=injection_duration, switch_pwr=switch_pwr)
 
     @property
     def polarity(self):
diff --git a/ohmpi/hardware_components/mb_2024_0_2.py b/ohmpi/hardware_components/mb_2024_0_2.py
index 187b450ebe69be42939c6912d511cfaaf6bf9ddf..b82545da18831c317eebe427710f78f1e65f1b7d 100644
--- a/ohmpi/hardware_components/mb_2024_0_2.py
+++ b/ohmpi/hardware_components/mb_2024_0_2.py
@@ -93,10 +93,10 @@ class Tx(Tx_mb_2023):
         if not subclass_init:
             self.exec_logger.event(f'{self.model}\ttx_init\tend\t{datetime.datetime.utcnow()}')
 
-    def inject(self, polarity=1, injection_duration=None):
+    def inject(self, polarity=1, injection_duration=None,switch_pwr=True):
         # add leds?
         self.pin6.value=True
-        Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration,switch_pwr=True)
+        Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration,switch_pwr=switch_pwr)
         self.pin6.value = False
 
     @property