diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 00bb42d..759b8d3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,25 +6,25 @@ jobs:
   Test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Cache pip
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ~/.cache/pip
         key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
         restore-keys: |
           ${{ runner.os }}-pip-
     - name: Cache PlatformIO
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ~/.platformio
         key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
     - name: Install PlatformIO
       run: |
         python -m pip install --upgrade pip
         pip install --upgrade platformio
     - name: Run PlatformIO
-      run: platformio ci --lib="." --board=uno --board=megaatmega2560 examples/MS5837_Example/*.ino
\ No newline at end of file
+      run: platformio ci --lib="." --board=uno --board=megaatmega2560 examples/MS5837_Example/*.ino
diff --git a/src/MS5837.cpp b/src/MS5837.cpp
index 3431e81..dda33df 100644
--- a/src/MS5837.cpp
+++ b/src/MS5837.cpp
@@ -16,9 +16,10 @@ const uint8_t MS5837::MS5837_30BA = 0;
 const uint8_t MS5837::MS5837_02BA = 1;
 const uint8_t MS5837::MS5837_UNRECOGNISED = 255;
 
-const uint8_t MS5837_02BA01 = 0x00; // Sensor version: From MS5837_02BA datasheet Version PROM Word 0
-const uint8_t MS5837_02BA21 = 0x15; // Sensor version: From MS5837_02BA datasheet Version PROM Word 0
-const uint8_t MS5837_30BA26 = 0x1A; // Sensor version: From MS5837_30BA datasheet Version PROM Word 0
+// context: https://github.com/ArduPilot/ardupilot/pull/29122#issuecomment-2877269114
+const uint16_t MS5837_02BA_MAX_SENSITIVITY = 49000;
+const uint16_t MS5837_02BA_30BA_SEPARATION = 37000;
+const uint16_t MS5837_30BA_MIN_SENSITIVITY = 26000;
 
 MS5837::MS5837() {
 	fluidDensity = 1029;
@@ -57,25 +58,24 @@ bool MS5837::init(TwoWire &wirePort) {
 		return false; // CRC fail
 	}
 
-	uint8_t version = (C[0] >> 5) & 0x7F; // Extract the sensor version from PROM Word 0
-
-	// Set _model according to the sensor version
-	if (version == MS5837_02BA01)
+	// PROM Word 1 represents the sensor's pressure sensitivity calibration
+	// Set _model according to the experimental pressure sensitivity thresholds
+	if (C[1] < MS5837_30BA_MIN_SENSITIVITY || C[1] > MS5837_02BA_MAX_SENSITIVITY)
 	{
-		_model = MS5837_02BA;
+		_model = MS5837_UNRECOGNISED;
 	}
-	else if (version == MS5837_02BA21)
+	else if (C[1] > MS5837_02BA_30BA_SEPARATION)
 	{
 		_model = MS5837_02BA;
 	}
-	else if (version == MS5837_30BA26)
-	{
-		_model = MS5837_30BA;
-	}
 	else
 	{
-		_model = MS5837_UNRECOGNISED;
+		_model = MS5837_30BA;
 	}
+
+	// TODO: extract and store/report sensor package type from bits 11-5 of PROM Word 0,
+	// per https://github.com/ArduPilot/ardupilot/pull/29122#pullrequestreview-2837597764
+
 	// The sensor has passed the CRC check, so we should return true even if
 	// the sensor version is unrecognised.
 	// (The MS5637 has the same address as the MS5837 and will also pass the CRC check)