The COGENG 2547-9038 (25479038) Water Temperature Sensor is a high-precision, direct OEM replacement sensor specifically designed for Doosan DH220-5 and DH225-7 excavators. These popular medium-to-large excavators are widely used in construction, mining, quarrying, and infrastructure projects worldwide.
This sensor monitors engine coolant temperature—one of the most critical parameters for engine performance, fuel efficiency, and longevity. The sensor uses a Negative Temperature Coefficient (NTC) thermistor—as coolant temperature increases, electrical resistance decreases. The ECU (Engine Control Unit) sends a reference voltage through the sensor and measures the return signal to calculate precise coolant temperature.
Why Coolant Temperature Monitoring is Critical:
| Function | How Temperature Data is Used |
|---|---|
| Fuel Injection Timing | Adjusts timing based on engine temperature for optimal combustion |
| Cold Start Assistance | Enables glow plugs / intake heaters in cold weather |
| Cooling Fan Control | Engages the hydraulic or electric fan at high temperatures |
| Warning Systems | Triggers alarms and derates the engine if overheating occurs |
| Emissions Control | Optimizes combustion for reduced emissions |
| Dashboard Gauge | Displays accurate temperature to the operator |
| Engine Protection | Shuts down engine if critical temperature is exceeded |
Manufactured under ISO9001 certified processes, the COGENG 2547-9038 features a brass/stainless steel housing, premium rubber O-ring, and a precision thermistor element to ensure accurate readings across the full temperature range (-40°C to +150°C).
Why Choose COGENG 2547-9038?
Direct OEM Replacement: Plug-and-play for Doosan DH220-5 and DH225-7.
High Accuracy: Precisely calibrated to Doosan ECU specifications.
Durable Construction: Brass/stainless steel housing withstands vibration and corrosion.
Leak-Proof: Premium O-ring pre-installed.
In Stock: Ready for immediate shipment with fast shipping.
| Component | Quantity | Description |
|---|---|---|
| Water Temperature Sensor | 1 | Complete sensor assembly with pre-attached connector |
| Rubber O-ring / Sealing Ring | 1 | Pre-installed on threaded base |
| Protective Plastic Cap | 1 | For shipping protection only |
| Installation Quick Guide | 1 | Basic instructions |
Note: No additional hardware or sealant is required for installation.
This sensor is specifically designed for the following Doosan excavators:
| Model | Engine | Typical Year Range | Application |
|---|---|---|---|
| Doosan DH220-5 | DB58 (5.8L, 6-cylinder) | 1995–2002 | Medium-large excavator |
| Doosan DH225-7 | DL06 (6.0L, 6-cylinder) | 2002–2010 | Medium-large excavator |
Additional compatible models (verify before purchase):
| Model | Compatibility |
|---|---|
| Doosan DH200-5 | ✅ Likely compatible |
| Doosan DH220LC-5 | ✅ Compatible |
| Doosan DH225LC-7 | ✅ Compatible |
| Doosan DH258-7 | ⚠️ Similar – verify |
| Doosan DX225 | ❌ Newer model – different sensor |
| Doosan DH220-3 | ❌ Older model – different sensor |
| Daewoo Solar 220LC-V | ⚠️ Verify connector type |
⚠️ Important: The DH220-5 uses the DB58 engine, while the DH225-7 uses the DL06 engine. The 2547-9038 sensor is compatible with both engine families.
| Parameter | DH220-5 | DH225-7 |
|---|---|---|
| Engine | DB58 (5.8L) | DL06 (6.0L) |
| Horsepower | ~180 HP | ~200 HP |
| Operating Weight | ~22,000 kg | ~23,500 kg |
| Electrical System | 24V | 24V |
Normal Coolant Temperature Ranges:
| Condition | Temperature | Action |
|---|---|---|
| Cold Start | 0-30°C (32-86°F) | Glow plugs active |
| Warmup | 30-70°C (86-158°F) | Normal operation |
| Normal Operating | 75-95°C (167-203°F) | Optimal fuel economy |
| High Temperature Warning | 100-105°C (212-221°F) | Check cooling system |
| Overheat / Derate | >105°C (>221°F) | Engine derates |
| Brand | Part Number | Notes |
|---|---|---|
| COGENG | 2547-9038 (also 25479038) | Direct replacement |
| Doosan (OEM) | 2547-9038 | Original equipment |
| Doosan (alternate) | 25479038 | Same (no dash) |
| Aftermarket | 2547-9039 | Similar (verify) |
Note: Always match your original sensor part number. 2547-9038 is the Doosan OEM number for this sensor.
✅ Direct OEM replacement for:
Doosan part number: 2547-9038 / 25479038
✅ Designed For:
Doosan DH220-5 excavator (DB58 engine)
Doosan DH225-7 excavator (DL06 engine)
✅ Engine Compatibility:
Doosan DB58 (5.8L, 6-cylinder)
Doosan DL06 (6.0L, 6-cylinder)
✅ Electrical Specifications:
Connector: 2-pin (Deutsch / AMP – matches Doosan)
Operating Voltage: 5V DC (reference from ECU)
Output: Variable resistance (NTC thermistor)
✅ Mechanical Specifications:
Thread Size: 1/8-27 NPT or M10x1
Hex Size: 17mm, 19mm, or 22mm
Sealing: Rubber O-ring (pre-installed)
⚠️ Before purchasing, please verify:
| Check Item | Why It's Important |
|---|---|
| Machine Model | DH220-5 or DH225-7 |
| Machine Serial Number | Helps confirm specific configuration |
| Old Part Number | 2547-9038 or 25479038 |
| Connector Type | 2-pin (photo recommended) |
| Thread Size | 1/8-27 NPT or M10x1 |
❌ NOT Compatible With:
Doosan DH220-3 (older – different sensor)
Doosan DX225 (newer – different sensor)
Doosan DH225-5 (verify)
Non-Doosan equipment (different ECU calibration)
Q1: What are the symptoms of a failing water temperature sensor on a Doosan DH220-5/DH225-7?
A: Common symptoms include:
Check Engine Light (CEL) with error codes.
Temperature gauge reads 0°C or pegged at maximum.
Engine derates (reduced power) due to incorrect ECU readings.
Hard starting in cold weather (no cold-start assist).
Cooling fan runs constantly or never runs.
Poor fuel economy.
Engine overheating without warning.
Q2: Is this a genuine Doosan OEM part?
A: No. COGENG is an aftermarket manufacturer (ISO9001) . Our parts are built to OEM specifications, offering the same fit and function at a reduced cost.
Q3: Will this sensor fit my Doosan DH220-5?
A: Yes – the DH220-5 is one of the primary compatible models.
Q4: Will this sensor fit my Doosan DH225-7?
A: Yes – the DH225-7 is one of the primary compatible models.
Q5: Will this sensor fit my Doosan DH220LC-5 (long undercarriage)?
A: Yes – the LC variant uses the same engine and sensor.
Q6: Will this sensor fit my Doosan DX225 (newer model)?
A: No – the DX series uses a different sensor design. This sensor is for DH series models.
Q7: What is the difference between 2547-9038 and 25479038?
A: No difference. They are the same part number – the dash is simply a formatting difference.
Q8: What is the correct torque for this sensor?
A: 15–25 Nm (11–18 ft-lbs) . Do not overtighten – the brass housing can crack.
Q9: Can I install this sensor myself?
A: Yes, with basic mechanical skills (15–20 minutes). If unsure, professional installation is recommended.
Q10: Is this sensor in stock for immediate shipping?
A: Yes – COGENG maintains stock of 500+ units. Orders ship within 24–48 hours.
Q11: How long does shipping take?
A:
Express (DHL/FedEx/UPS/TNT): 3–7 business days worldwide.
Air freight: 7–12 days.
Sea freight: 20–40 days.
Q12: How do I place a trial order?
A: Contact your COGENG distributor. MOQ is 1 piece.
Q13: What is the warranty?
A: COGENG provides a 6-month warranty against manufacturing defects.
| Code | Description | Likely Issue |
|---|---|---|
| 110-03 | Engine Coolant Temp Sensor – Voltage High | Sensor open circuit / disconnected |
| 110-04 | Engine Coolant Temp Sensor – Voltage Low | Sensor shorted / internal failure |
| 110-08 | Engine Coolant Temp Sensor – Abnormal Frequency | Wiring interference / poor connection |
| PID 110 | Coolant Temperature – Out of Range | Sensor reading unrealistic |
If codes persist after sensor replacement, check the wiring harness for damage.
| Parameter | Value |
|---|---|
| Sensor Type | NTC Thermistor |
| Temperature Range | -40°C to +150°C |
| Resistance @ 25°C (77°F) | ~10,000 Ω |
| Resistance @ 80°C (176°F) | ~2,000 Ω |
| Resistance @ 100°C (212°F) | ~1,000 Ω |
| Connector Type | 2-pin Deutsch / AMP |
| Thread Size | 1/8-27 NPT or M10x1 |
| Hex Size | 17mm / 19mm / 22mm |
| Housing Material | Brass / Stainless Steel |
| Seal Material | Nitrile rubber (NBR) |
| Operating Voltage | 5V DC (from ECU) |
| Response Time | <5 seconds |
| ISO Standard | ISO9001:2015 |
| Country of Origin | China (Guangdong) |
| HS Code | 90259000 |
| Weight | Approx. 40g |
| Condition | Temperature | Gauge Reading | Action |
|---|---|---|---|
| Cold Start | 0-30°C (32-86°F) | Cold | Glow plugs active |
| Warmup | 30-70°C (86-158°F) | Rising | Normal |
| Normal Operating | 75-95°C (167-203°F) | Mid-range | Normal |
| High Temp Warning | 100-105°C (212-221°F) | Red zone | Check cooling system |
| Overheat / Derate | >105°C (>221°F) | Red zone | Engine derates |
To ensure we ship the correct sensor, please provide:
Machine Model: DH220-5 or DH225-7
Machine Serial Number: (helps confirm configuration)
Old Part Number: 2547-9038 or 25479038
Photo of Old Sensor: (recommended – helps identify connector and thread type)
✅ In Stock – Ready to Ship.
✅ MOQ 1 piece accepted for trial orders.
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